diff --git a/Qrakhen.Qamp.CLI/ConsoleCode.cs b/Qrakhen.Qamp.CLI/ConsoleCode.cs
new file mode 100644
index 0000000..60fee39
--- /dev/null
+++ b/Qrakhen.Qamp.CLI/ConsoleCode.cs
@@ -0,0 +1,6 @@
+public enum ConsoleCode
+{
+    Error = -1,
+    OK = 0,
+    Exit = 1
+}
diff --git a/Qrakhen.Qamp.CLI/ConsoleExtensions.cs b/Qrakhen.Qamp.CLI/ConsoleExtensions.cs
new file mode 100644
index 0000000..39a053c
--- /dev/null
+++ b/Qrakhen.Qamp.CLI/ConsoleExtensions.cs
@@ -0,0 +1,10 @@
+public static class ConsoleExtensions
+{
+    public static bool Check(this ConsoleKeyInfo keyInfo, ConsoleKey key, ConsoleModifiers modifier = default, bool exactModifier = false)
+    {
+        return ((exactModifier ? 
+                keyInfo.Modifiers == modifier : 
+                (keyInfo.Modifiers & modifier) == modifier) 
+            && keyInfo.Key == key); 
+    }
+}
\ No newline at end of file
diff --git a/Qrakhen.Qamp.CLI/ConsoleRenderer.cs b/Qrakhen.Qamp.CLI/ConsoleRenderer.cs
new file mode 100644
index 0000000..0196dbd
--- /dev/null
+++ b/Qrakhen.Qamp.CLI/ConsoleRenderer.cs
@@ -0,0 +1,58 @@
+
+using Qrakhen.Qamp.Core;
+using Qrakhen.Qamp.Core.Tokenization;
+using System.Text;
+
+public class ConsoleRenderer
+{
+    private readonly IReader<Token> _reader;
+    private readonly Stream _stream;
+
+    public ConsoleRenderer(Stream stream)
+    {
+        _stream = new MemoryStream();
+        stream.Position = 0;
+        stream.CopyTo(_stream);
+        _reader = new Reader(_stream);
+    }
+
+    public void Render((int x, int y) position)
+    {
+        Console.CursorVisible = false;
+        Console.SetCursorPosition(position.x, position.y);
+        List<Token> tokens = [];        
+        while (!_reader.Done) {
+            tokens.Add(_reader.NextToken(true));
+        }
+        _stream.Position = 0;
+        foreach (var token in tokens) {
+            ConsoleColor color = ConsoleColor.Gray;
+            if (token.Type.IsBoolean())
+                color = ConsoleColor.Blue;
+            if (token.Type.IsString())
+                color = ConsoleColor.Magenta;
+            if (token.Type.IsNumber())
+                color = ConsoleColor.DarkCyan;
+            if (token.Type.IsOperator())
+                color = ConsoleColor.DarkGreen;
+            if (token.Type.IsBracket())
+                color = ConsoleColor.Red;
+            if (token.Type.IsIdentifier())
+                color = ConsoleColor.White;
+            if (token.Type.IsControl())
+                color = ConsoleColor.DarkYellow;
+            if (token.Type == TokenType.Error)
+                color = ConsoleColor.DarkRed;
+            Console.ForegroundColor = color;
+            byte[] buffer = new byte[token.Span.Length];
+            _stream.ReadExactly(buffer, 0, (int)token.Span.Length);
+            string str = Encoding.Default.GetString(buffer);
+            Console.Write(str);
+            Console.ForegroundColor = ConsoleColor.White;
+            if (token.Type == TokenType.NewLine)
+                Console.Write("  : ");
+        }
+        Console.ForegroundColor = ConsoleColor.White;
+        Console.CursorVisible = true;
+    }
+}
diff --git a/Qrakhen.Qamp.CLI/ConsoleWriter.cs b/Qrakhen.Qamp.CLI/ConsoleWriter.cs
new file mode 100644
index 0000000..0693014
--- /dev/null
+++ b/Qrakhen.Qamp.CLI/ConsoleWriter.cs
@@ -0,0 +1,142 @@
+using System.Text;
+
+public class ConsoleWriter
+{
+    private const string SYMBOL_INPUT = " <: ";
+    private const string SYMBOL_INPUT_CONTINUE = "  : ";
+
+    private readonly List<char> _buffer = [];
+    private readonly Stack<char[]> _history = [];
+    private readonly Encoding _encoding;
+
+    private int _position;
+    private (int x, int y) _origin;
+    private (int x, int y) _cursorPosition => Console.GetCursorPosition();
+
+    private int _cursorOffset => SYMBOL_INPUT.Length;
+    private int _cursorLeft { get => Console.CursorLeft; set => Console.CursorLeft = value; }
+    private int _cursorTop { get => Console.CursorTop; set => Console.CursorTop = value; }
+
+    public bool UseSyntaxHighlighting { get; set; } = false;
+
+    public ConsoleWriter(Encoding encoding)
+    {
+        _encoding = encoding; 
+    }
+
+    private void Write(char c) => Console.Write(c); 
+    private void Write(string str) => Console.Write(str);
+    private void SetCursor((int x, int y) position) => Console.SetCursorPosition(position.x, position.y);
+
+    private void SetColor(ConsoleColor color, ConsoleColor background = ConsoleColor.Black)
+    {
+        Console.ForegroundColor = color;
+        Console.BackgroundColor = background;
+    }
+
+    private void Move(int x, int y = 0)
+    {
+        _position = Math.Min(_buffer.Count, Math.Max(0, _position + x));
+        _cursorLeft -= 1; //????
+    }
+
+    private void ClearLine()
+    {
+        int left = _cursorLeft;
+        while (_cursorLeft < Console.BufferWidth - 1)
+            Write(' ');
+        _cursorLeft = left;
+    }
+
+    private void Print((int x, int y) origin, (int x, int y)? remain = null)
+    {
+        SetColor(ConsoleColor.White);
+        SetCursor(origin);
+        Write(" <: ");
+        foreach (var c in _buffer) {
+            if (c == '\n') {
+                ClearLine();
+                Write("\n  : ");
+            } else {
+                Write(c);
+            }
+        }
+        ClearLine();
+        if (remain.HasValue)
+            SetCursor(remain.Value);
+    }
+
+    private Stream Dispatch()
+    {
+        var stream = new MemoryStream();
+        var data = _buffer.ToArray();
+        stream.Write(_encoding.GetBytes(data));
+        _history.Push(data);
+        _buffer.Clear();
+        return stream;
+    }
+
+    public ConsoleCode Read(out Stream? stream)
+    {
+        stream = null;
+        ConsoleKeyInfo input;
+        _origin = _cursorPosition;
+        _position = 0;
+        Print(_origin);
+        do {
+            if (UseSyntaxHighlighting)
+                new ConsoleRenderer(new MemoryStream(_encoding.GetBytes(_buffer.ToArray()))).Render(_origin); // ~ so efficient ~ XD
+            Print(_origin, _cursorPosition);
+            input = Console.ReadKey(true);
+
+            if (input.Modifiers == ConsoleModifiers.Control) {
+                if (input.Key == ConsoleKey.C)
+                    return ConsoleCode.Exit;
+
+                if (input.Key == ConsoleKey.H) {
+                    UseSyntaxHighlighting = !UseSyntaxHighlighting;
+                    Write($"\n #: {nameof(UseSyntaxHighlighting)} = {UseSyntaxHighlighting}\n <: ");
+                    _origin = _cursorPosition;
+                }
+                if (input.Key == ConsoleKey.LeftArrow) {
+                    
+                }
+                continue;
+            }
+
+            if (input.Key == ConsoleKey.LeftArrow) {
+                if (_position > 0) {
+                    _position--;
+                    _cursorLeft--;
+                }
+                continue;
+            }
+
+            if (input.Key == ConsoleKey.RightArrow) {
+                if (_position < _buffer.Count) {
+                    _position++;
+                    _cursorLeft++;
+                }
+                continue;
+            }
+
+            if (input.Key == ConsoleKey.Backspace) {
+                if (_position > 0) {
+                    _cursorLeft--;
+                    _buffer.RemoveRange(--_position, 1);
+                }
+                continue;
+            } else if (input.Check(ConsoleKey.Enter, ConsoleModifiers.Shift)) {
+                _buffer.Insert(_position++, '\n');
+                _cursorLeft = _cursorOffset;
+                _cursorTop++;
+                continue;
+            } else {
+                _buffer.Insert(_position++, input.KeyChar);
+                _cursorLeft++;
+            }
+        } while (!input.Check(ConsoleKey.Enter, ConsoleModifiers.None, true));
+        stream = Dispatch();
+        return ConsoleCode.OK;
+    }
+}
diff --git a/Qrakhen.Qamp.CLI/Program.cs b/Qrakhen.Qamp.CLI/Program.cs
index 12a7b63..d6e85ad 100644
--- a/Qrakhen.Qamp.CLI/Program.cs
+++ b/Qrakhen.Qamp.CLI/Program.cs
@@ -1,19 +1,20 @@
 
 using Qrakhen.Qamp.Core;
 using Qrakhen.Qamp.Core.Execution;
-using Qrakhen.Qamp.Core.Tokenization;
+using Qrakhen.Qamp.Core.Logging;
 using System.Text;
 
 char[] Ignored = [ '\0', '\b' ];
+LoggerService.Default = LogLevel.Error;
 Stack<byte[]> History = [];
 ConsoleKeyInfo input;
 bool useSyntaxHighlighting = false;
 (int x, int y) cursor = (0, 0);
 ConsoleCode code = ConsoleCode.Error;
 Runner runner = new Runner(new Options());
-ConsoleInterface cli = new ConsoleInterface(Encoding.Default);
+ConsoleWriter cli = new ConsoleWriter(Encoding.Default);
 do {
-    /*Console.ForegroundColor = ConsoleColor.White;
+    Console.ForegroundColor = ConsoleColor.White;
     MemoryStream stream = new MemoryStream();
     Console.Write(" <: ");
     cursor = Console.GetCursorPosition();
@@ -28,6 +29,11 @@ do {
                 Console.Write($"\n #: {nameof(useSyntaxHighlighting)} = {useSyntaxHighlighting}\n <: ");
                 cursor = Console.GetCursorPosition();
             }
+            if (input.Key == ConsoleKey.L) {
+                LoggerService.Default = LoggerService.Default < LogLevel.All ? LogLevel.All : LogLevel.Info;
+                Console.Write($"\n #: LogLevel = {LoggerService.Default}\n <: ");
+                cursor = Console.GetCursorPosition();
+            }
             continue;
         }
 
@@ -64,17 +70,10 @@ do {
                 Console.Write(input.KeyChar);
             stream.Insert(Encoding.Default.GetBytes([input.KeyChar], 0, 1));
         }
-    } while (input.Key != ConsoleKey.Enter || input.Modifiers == ConsoleModifiers.Shift);*/
+    } while (input.Key != ConsoleKey.Enter || input.Modifiers == ConsoleModifiers.Shift);
     try {
-        code = cli.Read(out Stream? stream);
-        if (code == ConsoleCode.OK) {
-            if (stream == null)
-                throw new QampException($"Stream from CLI was null {code}");
-            Console.WriteLine();
-            runner.Run(stream);
-        }
-        if (code == ConsoleCode.Error)
-            throw new QampException($"CLI returned {code}");        
+        Console.WriteLine();
+        runner.Run(stream);
     }
     catch (QampException e) {
         Console.ForegroundColor = ConsoleColor.Yellow;
@@ -93,216 +92,3 @@ do {
         }
     }
 } while(code != ConsoleCode.Exit);
-
-class ConsoleInterface
-{
-    private const string SYMBOL_INPUT = " <: ";
-    private const string SYMBOL_INPUT_CONTINUE = "  : ";
-
-    private readonly List<char> _buffer = [];
-    private readonly Stack<char[]> _history = [];
-    private readonly Encoding _encoding;
-
-    private int _position;
-    private (int x, int y) _origin;
-    private (int x, int y) _cursorPosition => Console.GetCursorPosition();
-
-    private int _cursorOffset => SYMBOL_INPUT.Length;
-    private int _cursorLeft { get => Console.CursorLeft; set => Console.CursorLeft = value; }
-    private int _cursorTop { get => Console.CursorTop; set => Console.CursorTop = value; }
-
-    public bool UseSyntaxHighlighting { get; set; } = false;
-
-    public ConsoleInterface(Encoding encoding)
-    {
-        _encoding = encoding; 
-    }
-
-    private void Write(char c) => Console.Write(c); 
-    private void Write(string str) => Console.Write(str);
-    private void SetCursor((int x, int y) position) => Console.SetCursorPosition(position.x, position.y);
-
-    private void SetColor(ConsoleColor color, ConsoleColor background = ConsoleColor.Black)
-    {
-        Console.ForegroundColor = color;
-        Console.BackgroundColor = background;
-    }
-
-    private void Move(int x, int y = 0)
-    {
-        _position = Math.Min(_buffer.Count, Math.Max(0, _position + x));
-        _cursorLeft -= 1; //????
-    }
-
-    private void ClearLine()
-    {
-        int left = _cursorLeft;
-        while (_cursorLeft < Console.BufferWidth - 1)
-            Write(' ');
-        _cursorLeft = left;
-    }
-
-    private void Print((int x, int y) origin, (int x, int y)? remain = null)
-    {
-        SetColor(ConsoleColor.White);
-        SetCursor(origin);
-        Write(" <: ");
-        foreach (var c in _buffer) {
-            if (c == '\n') {
-                ClearLine();
-                Write("\n  : ");
-            } else {
-                Write(c);
-            }
-        }
-        ClearLine();
-        if (remain.HasValue)
-            SetCursor(remain.Value);
-    }
-
-    private Stream Dispatch()
-    {
-        var stream = new MemoryStream();
-        var data = _buffer.ToArray();
-        stream.Write(_encoding.GetBytes(data));
-        _history.Push(data);
-        _buffer.Clear();
-        return stream;
-    }
-
-    public ConsoleCode Read(out Stream? stream)
-    {
-        stream = null;
-        ConsoleKeyInfo input;
-        _origin = _cursorPosition;
-        _position = 0;
-        Print(_origin);
-        do {
-            if (UseSyntaxHighlighting)
-                new ConsoleRenderer(new MemoryStream(_encoding.GetBytes(_buffer.ToArray()))).Render(_origin); // ~ so efficient ~ XD
-            Print(_origin, _cursorPosition);
-            input = Console.ReadKey(true);
-
-            if (input.Modifiers == ConsoleModifiers.Control) {
-                if (input.Key == ConsoleKey.C)
-                    return ConsoleCode.Exit;
-
-                if (input.Key == ConsoleKey.H) {
-                    UseSyntaxHighlighting = !UseSyntaxHighlighting;
-                    Write($"\n #: {nameof(UseSyntaxHighlighting)} = {UseSyntaxHighlighting}\n <: ");
-                    _origin = _cursorPosition;
-                }
-                if (input.Key == ConsoleKey.LeftArrow) {
-                    
-                }
-                continue;
-            }
-
-            if (input.Key == ConsoleKey.LeftArrow) {
-                if (_position > 0) {
-                    _position--;
-                    _cursorLeft--;
-                }
-                continue;
-            }
-
-            if (input.Key == ConsoleKey.RightArrow) {
-                if (_position < _buffer.Count) {
-                    _position++;
-                    _cursorLeft++;
-                }
-                continue;
-            }
-
-            if (input.Key == ConsoleKey.Backspace) {
-                if (_position > 0) {
-                    _cursorLeft--;
-                    _buffer.RemoveRange(--_position, 1);
-                }
-                continue;
-            } else if (input.Check(ConsoleKey.Enter, ConsoleModifiers.Shift)) {
-                _buffer.Insert(_position++, '\n');
-                _cursorLeft = _cursorOffset;
-                _cursorTop++;
-                continue;
-            } else {
-                _buffer.Insert(_position++, input.KeyChar);
-                _cursorLeft++;
-            }
-        } while (!input.Check(ConsoleKey.Enter, ConsoleModifiers.None, true));
-        stream = Dispatch();
-        return ConsoleCode.OK;
-    }
-}
-
-enum ConsoleCode
-{
-    Error = -1,
-    OK = 0,
-    Exit = 1
-}
-
-class ConsoleRenderer
-{
-    private readonly IReader<Token> _reader;
-    private readonly Stream _stream;
-
-    public ConsoleRenderer(Stream stream)
-    {
-        _stream = new MemoryStream();
-        stream.Position = 0;
-        stream.CopyTo(_stream);
-        _reader = new Reader(_stream);
-    }
-
-    public void Render((int x, int y) position)
-    {
-        Console.CursorVisible = false;
-        Console.SetCursorPosition(position.x, position.y);
-        List<Token> tokens = [];        
-        while (!_reader.Done) {
-            tokens.Add(_reader.NextToken(true));
-        }
-        _stream.Position = 0;
-        foreach (var token in tokens) {
-            ConsoleColor color = ConsoleColor.Gray;
-            if (token.Type.IsBoolean())
-                color = ConsoleColor.Blue;
-            if (token.Type.IsString())
-                color = ConsoleColor.Red;
-            if (token.Type.IsNumber())
-                color = ConsoleColor.DarkCyan;
-            if (token.Type.IsOperator())
-                color = ConsoleColor.DarkGreen;
-            if (token.Type.IsBracket())
-                color = ConsoleColor.Yellow;
-            if (token.Type.IsIdentifier())
-                color = ConsoleColor.White;
-            if (token.Type.IsControl())
-                color = ConsoleColor.DarkYellow;
-            if (token.Type == TokenType.Error)
-                color = ConsoleColor.DarkRed;
-            Console.ForegroundColor = color;
-            byte[] buffer = new byte[token.Span.Length];
-            _stream.ReadExactly(buffer, 0, (int)token.Span.Length);
-            string str = Encoding.Default.GetString(buffer);
-            Console.Write(str);
-            Console.ForegroundColor = ConsoleColor.White;
-            if (token.Type == TokenType.NewLine)
-                Console.Write("  : ");
-        }
-        Console.ForegroundColor = ConsoleColor.White;
-        Console.CursorVisible = true;
-    }
-}
-
-public static class ConsoleExtensions
-{
-    public static bool Check(this ConsoleKeyInfo keyInfo, ConsoleKey key, ConsoleModifiers modifier = default, bool exactModifier = false)
-    {
-        return ((exactModifier ? 
-                keyInfo.Modifiers == modifier : 
-                (keyInfo.Modifiers & modifier) == modifier) 
-            && keyInfo.Key == key); 
-    }
-}
\ No newline at end of file
diff --git a/Qrakhen.Qamp.CLI/_Program.cs b/Qrakhen.Qamp.CLI/_Program.cs
new file mode 100644
index 0000000..492ceb8
--- /dev/null
+++ b/Qrakhen.Qamp.CLI/_Program.cs
@@ -0,0 +1,43 @@
+
+using Qrakhen.Qamp.Core;
+using Qrakhen.Qamp.Core.Execution;
+using Qrakhen.Qamp.Core.Tokenization;
+using System.Text;
+
+class C
+{
+    void X()
+    {
+        ConsoleCode code = ConsoleCode.Exit;
+        Runner runner = new Runner(new Options());
+        ConsoleWriter cli = new ConsoleWriter(Encoding.Default);
+        do {
+            try {
+                code = cli.Read(out Stream? stream);
+                if (code == ConsoleCode.OK) {
+                    if (stream == null)
+                        throw new QampException($"Stream from CLI was null {code}");
+                    Console.WriteLine();
+                    runner.Run(stream);
+                }
+                if (code == ConsoleCode.Error)
+                    throw new QampException($"CLI returned {code}");
+
+            } catch (QampException e) {
+                Console.ForegroundColor = ConsoleColor.Yellow;
+                Console.WriteLine($" !> {e.Message}");
+                if (e.StackTrace != null) {
+                    Console.Write($" !  ");
+                    Console.WriteLine(string.Join("\n !  ", e.StackTrace.Split('\n')));
+                }
+            } catch (Exception e) {
+                Console.ForegroundColor = ConsoleColor.DarkRed;
+                Console.WriteLine($" !? {e.Message}");
+                if (e.StackTrace != null) {
+                    Console.Write($" !  ");
+                    Console.WriteLine(string.Join("\n !  ", e.StackTrace.Split('\n')));
+                }
+            }
+        } while (code != ConsoleCode.Exit);
+    }
+}
diff --git a/Qrakhen.Qamp.Core/Collections/Pointer.cs b/Qrakhen.Qamp.Core/Collections/Pointer.cs
index bac7541..780c0e2 100644
--- a/Qrakhen.Qamp.Core/Collections/Pointer.cs
+++ b/Qrakhen.Qamp.Core/Collections/Pointer.cs
@@ -6,7 +6,7 @@
 public class Pointer<T>
 {
     protected IGetSet<long, T> Target;
-    public long Ptr;
+    public long Cursor;
 
     public T Current {
         get => Get();
@@ -16,41 +16,41 @@ public class Pointer<T>
     public Pointer(IGetSet<long, T> target, long pointer = 0)
     {
         Target = target;
-        Ptr = pointer;
+        Cursor = pointer;
     }
 
     public Pointer<T> Branch(long delta = 0)
     {
-        return new Pointer<T>(Target, Ptr + delta);
+        return new Pointer<T>(Target, Cursor + delta);
     }
 
     /// <summary>
     ///     Returns the next item from <see cref="Target"/> and increases the pointer by 1.
     /// </summary>
-    public T Next() => Target.Get(Ptr++);
+    public T Next() => Target.Get(Cursor++);
 
     /// <summary>
-    ///     Sets the value of <see cref="Target"/> at <paramref name="position"/>. 
+    ///     Sets the value of <see cref="Target"/> RELATIVE from the current position (<paramref name="delta"/>).
     /// </summary>
-    public void Set(long position, T value) => Target.Set(position, value);
+    public void Set(long delta, T value) => Target.Set(Cursor + delta, value);
 
     /// <summary>
-    ///     Sets the value of <see cref="Target"/> at the current <see cref="Ptr"/> location. 
+    ///     Sets the value of <see cref="Target"/> at the current <see cref="Cursor"/> location. 
     /// </summary>
-    public void Set(T value) => Set(Ptr, value);
+    public void Set(T value) => Set(Cursor, value);
 
     /// <summary>
-    ///     Gets the value of <see cref="Target"/> at <paramref name="position"/>. 
+    ///     Gets the value of <see cref="Target"/> RELATIVE from the current position (<paramref name="delta"/>). 
     /// </summary>
-    public T Get(long position) => Target.Get(position);
+    public T Get(long delta) => Target.Get(Cursor + delta);
 
     /// <summary>
-    ///     Gets the value of <see cref="Target"/> at the current <see cref="Ptr"/> location. 
+    ///     Gets the value of <see cref="Target"/> at the current <see cref="Cursor"/> location. 
     /// </summary>
-    public T Get() => Get(Ptr);
+    public T Get() => Get(Cursor);
 
     public override string ToString()
     {
-        return $"&{Ptr:X4}={Current}";
+        return $"&{Cursor:X4}={Current}";
     }
 }
diff --git a/Qrakhen.Qamp.Core/Compilation/ExpressionParser.cs b/Qrakhen.Qamp.Core/Compilation/ExpressionParser.cs
index 47736aa..30a3cf8 100644
--- a/Qrakhen.Qamp.Core/Compilation/ExpressionParser.cs
+++ b/Qrakhen.Qamp.Core/Compilation/ExpressionParser.cs
@@ -241,6 +241,11 @@ public static class ExpressionParser
         }
     }
 
+    static void TypeOf(Digester digester, bool canAssign)
+    {
+        digester.TypeOf();
+    }
+
     static ExpressionParser()
     {
         _rules[TokenType.GroupOpen]       = new Rule(Group,     Call,   Weight.Call);
@@ -290,11 +295,11 @@ public static class ExpressionParser
         _rules[TokenType.Null]            = new Rule(Literal,   null,   Weight.None);
         _rules[TokenType.Or]              = new Rule(null,      Or,     Weight.Or);
         _rules[TokenType.Print]           = new Rule(null,      null,   Weight.None);
-        _rules[TokenType.TypeOf]          = new Rule(null,      null,   Weight.None);
+        _rules[TokenType.TypeOf]          = new Rule(TypeOf,    null,   Weight.None);
         _rules[TokenType.Export]          = new Rule(null,      null,   Weight.None);
         _rules[TokenType.Import]          = new Rule(null,      null,   Weight.None);
         _rules[TokenType.Return]          = new Rule(null,      null,   Weight.None);
-        _rules[TokenType.Base]           = new Rule(Base,      null,   Weight.None);
+        _rules[TokenType.Base]            = new Rule(Base,      null,   Weight.None);
         _rules[TokenType.This]            = new Rule(This,      null,   Weight.None);
         _rules[TokenType.True]            = new Rule(Literal,   null,   Weight.None);
         _rules[TokenType.Var]             = new Rule(null,      null,   Weight.None);
diff --git a/Qrakhen.Qamp.Core/Execution/InstructionPtr.cs b/Qrakhen.Qamp.Core/Execution/InstructionPtr.cs
index 968ad81..49b42e2 100644
--- a/Qrakhen.Qamp.Core/Execution/InstructionPtr.cs
+++ b/Qrakhen.Qamp.Core/Execution/InstructionPtr.cs
@@ -8,7 +8,7 @@ public class InstructionPtr : Pointer<Instruction>
 {
     public Segment Segment;
 
-    public Instruction Instruction => Segment.Instructions[Ptr];
+    public Instruction Instruction => Segment.Instructions[Cursor];
 
     public InstructionPtr(Segment segment, int position = 0) : base(segment.Instructions, position)
     {
@@ -17,8 +17,8 @@ public class InstructionPtr : Pointer<Instruction>
 
     public long NextLong()
     {
-        long value = Segment.ReadLong(Ptr);
-        Ptr += sizeof(long);
+        long value = Segment.ReadLong(Cursor);
+        Cursor += sizeof(long);
         return value;
     }
 
@@ -37,8 +37,8 @@ public class InstructionPtr : Pointer<Instruction>
 
     public long NextDynamic()
     {
-        var result = Segment.ReadDynamic(Ptr, out int read);
-        Ptr += read;
+        var result = Segment.ReadDynamic(Cursor, out int read);
+        Cursor += read;
         return result;
     }
 
@@ -46,20 +46,20 @@ public class InstructionPtr : Pointer<Instruction>
         => Segment.Constants[offset].Ptr.Value as String;
 
     public static Instruction operator +(InstructionPtr ptr, int value) 
-        => ptr.Segment.Instructions[ptr.Ptr + value];
+        => ptr.Segment.Instructions[ptr.Cursor + value];
 
     public static Instruction operator -(InstructionPtr ptr, int value) 
-        => ptr.Segment.Instructions[ptr.Ptr - value];
+        => ptr.Segment.Instructions[ptr.Cursor - value];
 
     public static InstructionPtr operator ++(InstructionPtr ptr)
     {
-        ptr.Ptr++;
+        ptr.Cursor++;
         return ptr;
     }
 
     public static InstructionPtr operator --(InstructionPtr ptr)
     {
-        ptr.Ptr--;
+        ptr.Cursor--;
         return ptr;
     }
 }
diff --git a/Qrakhen.Qamp.Core/Execution/Runner.cs b/Qrakhen.Qamp.Core/Execution/Runner.cs
index a7e3e9d..e45982b 100644
--- a/Qrakhen.Qamp.Core/Execution/Runner.cs
+++ b/Qrakhen.Qamp.Core/Execution/Runner.cs
@@ -53,6 +53,10 @@ public class Runner : IDisposable
     public ExecutionResult Run(Stream stream)
     {
         _logger.Method();
+        if (Stack.Position < 0) {
+            _logger.Warn($"Something went wrong, stack cursor is at {Stack.Position}. Resetting Stack.");
+            Stack.Decimate(0);
+        }
         using Reader reader = new Reader(stream);
         Compilation.Digester digester = new(reader);
         Function function = digester.Digest();
@@ -95,7 +99,7 @@ public class Runner : IDisposable
                 case Op.GetGlobal: {
                     string? name = call.Instruction.GetStringConstant(call.Instruction.NextDynamic())?.Value;
                     if (string.IsNullOrEmpty(name))
-                        throw new RuntimeException($"tried to set global variable with empty name");
+                        return Error($"tried to set global variable with empty name");
                     if (!Globals.Has(name))
                         Push(Value.Void);
                     else
@@ -107,9 +111,9 @@ public class Runner : IDisposable
                 case Op.SetGlobal: {
                     string? name = call.Instruction.GetStringConstant(call.Instruction.NextDynamic())?.Value;
                     if (string.IsNullOrEmpty(name))
-                        throw new RuntimeException($"tried to set global variable with empty name");
+                        return Error($"tried to set global variable with empty name");
                     if (!Globals.Has(name))
-                        throw new RuntimeException($"tried to set a value of non-existing global variable");
+                        return Error($"tried to set a value of non-existing global variable");
                     Globals[name] = Pop();
                     _logger.Verbose($"set global {name} = {Globals[name]}");
                     break;
@@ -118,7 +122,7 @@ public class Runner : IDisposable
                 case Op.DefineGlobal: {
                     string? name = call.Instruction.GetStringConstant(call.Instruction.NextDynamic())?.Value;
                     if (string.IsNullOrEmpty(name))
-                        throw new RuntimeException($"tried to define global variable with empty name");
+                        return Error($"tried to define global variable with empty name");
                     Globals[name] = Pop();
                     _logger.Verbose($"defined global {name} as {Globals[name]}");
                     break;
@@ -189,20 +193,20 @@ public class Runner : IDisposable
 
                 case Op.Jump: {
                     long delta = call.Instruction.NextLong();
-                    call.Instruction.Ptr += delta;
+                    call.Instruction.Cursor += delta;
                     break;
                 }
 
                 case Op.JumpIfFalse: {
                     long delta = call.Instruction.NextLong();
                     if (Peek().IsFalsy)
-                        call.Instruction.Ptr += delta;
+                        call.Instruction.Cursor += delta;
                     break;
                 }
 
                 case Op.Loop: {
                     long delta = call.Instruction.NextLong();
-                    call.Instruction.Ptr -= delta;
+                    call.Instruction.Cursor -= delta;
                     break;
                 }
 
@@ -263,7 +267,7 @@ public class Runner : IDisposable
                         Pop();
                         return ExecutionResult.OK;
                     }
-                    Stack.Decimate(call.StackPtr.Ptr);
+                    Stack.Decimate(call.StackPtr.Cursor);
                     Push(result);
                     call = Calls.Peek();
                     break;
@@ -293,7 +297,18 @@ public class Runner : IDisposable
 
                 case Op.Typeof: {
                     Value value = Pop();
-                    Push(String.Make(value.Type.ToString()));
+                    string type;
+                    if (value.Is(T.Class))
+                        type = value.Ptr.As<Class>()!.Name;
+                    else if (value.Is(T.Instance))
+                        type = $"instance of {value.Ptr.As<Instance>()!.Class.Name}";
+                    else if (value.Is(T.Function))
+                        type = $"function {value.Ptr.As<Function>()!.Name}";
+                    else if (value.Is(T.Method))
+                        type = $"method {value.Ptr.As<Method>()!.Function.Name}";
+                    else
+                        type = value.Type.ToString();
+                    Push(String.Make(type));
                     break;
                 }
 
@@ -321,7 +336,7 @@ public class Runner : IDisposable
                     return Error($"Unexpected or not yet supported OpCode {opCode}!");
             }
 
-        } while (call.Instruction.Segment.Instructions.Length > call.Instruction.Ptr);
+        } while (call.Instruction.Segment.Instructions.Length > call.Instruction.Cursor);
         
         return ExecutionResult.OK;
     }
@@ -331,11 +346,11 @@ public class Runner : IDisposable
         Outer? outer = null;
         for (int i = Outers.Count; i-->0;) {
             outer = Outers[i];
-            if (outer.Target.Ptr <= target.Ptr)
+            if (outer.Target.Cursor <= target.Cursor)
                 break;
         }
 
-        if (outer != null && outer.Target.Ptr == target.Ptr)
+        if (outer != null && outer.Target.Cursor == target.Cursor)
             return outer;
 
         return new Outer(target);
@@ -347,7 +362,7 @@ public class Runner : IDisposable
             Outer outer = Outers[i];
             if (outer.IsClosed)
                 continue;
-            if (outer.Target.Ptr < last.Ptr)
+            if (outer.Target.Cursor < last.Cursor)
                 return;
             outer.Close();
         }
@@ -356,11 +371,15 @@ public class Runner : IDisposable
     private bool Invoke(Context closure, int argumentCount)
     {
         _logger.Method();
-        if (argumentCount != closure.Function.ArgumentCount)
-            throw new Exception($"Expected {closure.Function.ArgumentCount} arguments but got {argumentCount}");
-        
-        if (Calls.Count > Options.MaxCalls)
-            throw new StackOverflowException($"Stack overflow {Calls.Count}");
+        if (argumentCount != closure.Function.ArgumentCount) {
+            Error($"Expected {closure.Function.ArgumentCount} arguments but got {argumentCount}");
+            return false;
+        }
+
+        if (Calls.Count > Options.MaxCalls) {
+            Error($"Stack overflow {Calls.Count}");
+            return false;
+        }
 
         Call call = new(closure, Stack, Cursor - argumentCount - 1);
         Calls.Push(call);
@@ -369,7 +388,7 @@ public class Runner : IDisposable
 
     private bool Invoke(string methodName, int argumentCount)
     {
-        Value value = Peek(-argumentCount);
+        Value value = Peek(-argumentCount - 1);
         if (!value.Is(T.Instance)) {
             Error($"Can not call {methodName} on value of {value}");
             return false;
@@ -430,7 +449,7 @@ public class Runner : IDisposable
             return false;
         }
 
-        Method method = new Method(value.Ptr.As<Function>()!, Peek());
+        Method method = new Method(value.Ptr.As<Context>()!.Function, Peek());
         Pop(); // remove instance from stack
         Push(Obj.Create(method));
         return true;
@@ -483,11 +502,18 @@ public class Runner : IDisposable
     {
         _logger.Method(message);
         _logger.Error(message, context);
+        Panic();
         if (@throw)
             throw new QampException(message, context);
         return ExecutionResult.Execution;
     }
 
+    private void Panic()
+    {
+        _logger.Method();
+        Stack.Decimate(0);
+    }
+
     public void Dispose()
     {
         _logger.Method();
diff --git a/Qrakhen.Qamp.Core/Logging/ILogger.cs b/Qrakhen.Qamp.Core/Logging/ILogger.cs
index cc4cdc3..5e9c08e 100644
--- a/Qrakhen.Qamp.Core/Logging/ILogger.cs
+++ b/Qrakhen.Qamp.Core/Logging/ILogger.cs
@@ -75,7 +75,8 @@ public class LoggerService
 public class Logger : ILogger, ILogFormatter
 {
     public string Name { get; private set; }
-    public LogLevel Level { get; set; }
+    private LogLevel _level;
+    public LogLevel Level { get => true ? LoggerService.Default : _level; set => _level = value; }
 
     private static Dictionary<LogLevel, (string First, string Extra)> headers = new() { 
         { LogLevel.Critical, (" !? ", " !? ") },
diff --git a/Qrakhen.Qamp.Core/Values/Objects/Class.cs b/Qrakhen.Qamp.Core/Values/Objects/Class.cs
index 34f2b59..0276c74 100644
--- a/Qrakhen.Qamp.Core/Values/Objects/Class.cs
+++ b/Qrakhen.Qamp.Core/Values/Objects/Class.cs
@@ -4,4 +4,9 @@ public class Class(string name) : Obj(ValueType.Class)
 {
     public readonly string Name = name;
     public Table Members = new();
+
+    public override string ToString()
+    {
+        return $"{Name} (Class)";
+    }
 }
diff --git a/Qrakhen.Qamp.Core/Values/Objects/Instance.cs b/Qrakhen.Qamp.Core/Values/Objects/Instance.cs
index e78daa8..afa23ef 100644
--- a/Qrakhen.Qamp.Core/Values/Objects/Instance.cs
+++ b/Qrakhen.Qamp.Core/Values/Objects/Instance.cs
@@ -4,4 +4,16 @@ public class Instance(Class @class) : Obj(ValueType.Instance)
 {
     public readonly Class Class = @class;
     public Table Values = new();
+
+    public override string ToString()
+    {
+        string str = $"{Class.Name} {{\n";
+        foreach (var member in Class.Members) {
+            str += $"  {member.Key}: {member.Value},\n";
+        }
+        foreach (var value in Values) {
+            str += $"  {value.Key}: {value.Value},\n";
+        }
+        return $"{str}}}";
+    }
 }