diff --git a/Wacs.Core/Instructions/Control.cs b/Wacs.Core/Instructions/Control.cs
index 6a3a562..c2038bb 100644
--- a/Wacs.Core/Instructions/Control.cs
+++ b/Wacs.Core/Instructions/Control.cs
@@ -89,8 +89,7 @@ public override void Validate(IWasmValidationContext context)
                 context.Assert(funcType,  "Invalid BlockType: {0}",Block.Type);
                 
                 //Check the parameters [t1*] and discard
-                context.OpStack.PopValues(funcType.ParameterTypes, ref _aside);
-                _aside.Clear();
+                context.OpStack.DiscardValues(funcType.ParameterTypes);
                 
                 //ControlStack will push the values back on (Control Frame is our Label)
                 context.PushControlFrame(BlockOp, funcType);
@@ -164,8 +163,7 @@ public override void Validate(IWasmValidationContext context)
                 context.Assert(funcType, "Invalid BlockType: {0}",Block.Type);
                 
                 //Check the parameters [t1*] and discard
-                context.OpStack.PopValues(funcType.ParameterTypes, ref _aside);
-                _aside.Clear();
+                context.OpStack.DiscardValues(funcType.ParameterTypes);
                 
                 //ControlStack will push the values back on (Control Frame is our Label)
                 context.PushControlFrame(LoopOp, funcType);
@@ -247,8 +245,7 @@ public override void Validate(IWasmValidationContext context)
                 context.OpStack.PopI32();
                 
                 //Check the parameters [t1*] and discard
-                context.OpStack.PopValues(ifType.ParameterTypes, ref _aside);
-                _aside.Clear();
+                context.OpStack.DiscardValues(ifType.ParameterTypes);
                 
                 //ControlStack will push the values back on (Control Frame is our Label)
                 context.PushControlFrame(IfOp, ifType);
@@ -444,8 +441,7 @@ public override void Validate(IWasmValidationContext context)
             var nthFrame = context.ControlStack.PeekAt((int)L.Value);
             
             //Validate results, but leave them on the stack
-            context.OpStack.PopValues(nthFrame.LabelTypes, ref _aside);
-            _aside.Clear();
+            context.OpStack.DiscardValues(nthFrame.LabelTypes);
 
             // if (!context.Unreachable)
             //     nthFrame.ConditionallyReachable = true;
@@ -544,7 +540,7 @@ public override void Validate(IWasmValidationContext context)
             //     nthFrame.ConditionallyReachable = true;
             
             //Pop values like we branch
-            context.OpStack.PopValues(nthFrame.LabelTypes, ref _aside);
+            context.OpStack.DiscardValues(nthFrame.LabelTypes);
             //But actually, we don't, so push them back on.
             context.OpStack.PushResult(nthFrame.LabelTypes);
         }
@@ -610,7 +606,8 @@ public override void Validate(IWasmValidationContext context)
             
             // if (!context.Unreachable)
             //     mthFrame.ConditionallyReachable = true;
-            
+
+            Stack<Value> aside = new();
             foreach (var lidx in Ls)
             {
                 context.Assert(context.ContainsLabel(lidx.Value),
@@ -619,16 +616,12 @@ public override void Validate(IWasmValidationContext context)
                 var nthFrame = context.ControlStack.PeekAt((int)lidx.Value);
                 context.Assert(nthFrame.LabelTypes.Arity == arity,
                     "Instruction br_table invalid. Label {0} had different arity {1} =/= {2}", lidx, nthFrame.LabelTypes.Arity,arity);
-
-                // if (!context.Unreachable)
-                //     nthFrame.ConditionallyReachable = true;
                 
-                context.OpStack.PopValues(nthFrame.LabelTypes, ref _aside);
-                context.OpStack.PushValues(_aside);
+                context.OpStack.PopValues(nthFrame.LabelTypes, ref aside);
+                context.OpStack.PushValues(aside);
             }
 
-            context.OpStack.PopValues(mthFrame.LabelTypes, ref _aside);
-            _aside.Clear();
+            context.OpStack.PopValues(mthFrame.LabelTypes, ref aside);
             context.SetUnreachable();
         }
 
@@ -723,8 +716,9 @@ public sealed class InstReturn : InstructionBase
         public override void Validate(IWasmValidationContext context)
         {
             //keep the results for the block or function to validate
-            context.OpStack.PopValues(context.ReturnType, ref _aside);
-            context.OpStack.PushValues(_aside);
+            Stack<Value> aside = new();
+            context.OpStack.PopValues(context.ReturnType, ref aside);
+            context.OpStack.PushValues(aside);
             context.SetUnreachable();
         }
 
@@ -770,8 +764,7 @@ public override void Validate(IWasmValidationContext context)
                 "Instruction call was invalid. Function {0} was not in the Context.",X);
             var func = context.Funcs[X];
             var type = context.Types[func.TypeIndex];
-            context.OpStack.PopValues(type.ParameterTypes, ref _aside);
-            _aside.Clear();
+            context.OpStack.DiscardValues(type.ParameterTypes);
             context.OpStack.PushResult(type.ResultType);
         }
 
@@ -891,8 +884,7 @@ public override void Validate(IWasmValidationContext context)
             var funcType = context.Types[Y];
 
             context.OpStack.PopI32();
-            context.OpStack.PopValues(funcType.ParameterTypes, ref _aside);
-            _aside.Clear();
+            context.OpStack.DiscardValues(funcType.ParameterTypes);
             context.OpStack.PushResult(funcType.ResultType);
         }
 
diff --git a/Wacs.Core/Instructions/InstructionBase.cs b/Wacs.Core/Instructions/InstructionBase.cs
index 6790074..e76371e 100644
--- a/Wacs.Core/Instructions/InstructionBase.cs
+++ b/Wacs.Core/Instructions/InstructionBase.cs
@@ -31,8 +31,6 @@ namespace Wacs.Core.Instructions
     /// </summary>
     public abstract class InstructionBase
     {
-        protected static Stack<Value> _aside = new();
-
         public bool IsAsync = false;
         public int Size = 1;
 
diff --git a/Wacs.Core/Instructions/TailCall.cs b/Wacs.Core/Instructions/TailCall.cs
index e31f23b..ae43eb0 100644
--- a/Wacs.Core/Instructions/TailCall.cs
+++ b/Wacs.Core/Instructions/TailCall.cs
@@ -53,8 +53,9 @@ public bool IsBound(ExecContext context)
         public override void Validate(IWasmValidationContext context)
         {
             //Return
-            context.OpStack.PopValues(context.ReturnType, ref _aside);
-            context.OpStack.PushValues(_aside);
+            Stack<Value> aside = new();
+            context.OpStack.PopValues(context.ReturnType, ref aside);
+            context.OpStack.PushValues(aside);
             context.SetUnreachable();
             
             //Call
@@ -62,8 +63,8 @@ public override void Validate(IWasmValidationContext context)
                 "Instruction call was invalid. Function {0} was not in the Context.",X);
             var func = context.Funcs[X];
             var type = context.Types[func.TypeIndex];
-            context.OpStack.PopValues(type.ParameterTypes, ref _aside);
-            _aside.Clear();
+            context.OpStack.PopValues(type.ParameterTypes, ref aside);
+            aside.Clear();
             context.OpStack.PushResult(type.ResultType);
         }
 
@@ -203,8 +204,9 @@ public bool IsBound(ExecContext context)
         public override void Validate(IWasmValidationContext context)
         {
             //Return
-            context.OpStack.PopValues(context.ReturnType, ref _aside);
-            context.OpStack.PushValues(_aside);
+            Stack<Value> aside = new();
+            context.OpStack.PopValues(context.ReturnType, ref aside);
+            context.OpStack.PushValues(aside);
             context.SetUnreachable();
             
             //Call Indirect
@@ -218,8 +220,8 @@ public override void Validate(IWasmValidationContext context)
             var funcType = context.Types[Y];
 
             context.OpStack.PopI32();
-            context.OpStack.PopValues(funcType.ParameterTypes, ref _aside);
-            _aside.Clear();
+            context.OpStack.PopValues(funcType.ParameterTypes, ref aside);
+            aside.Clear();
             context.OpStack.PushResult(funcType.ResultType);
         }
 
diff --git a/Wacs.Core/Instructions/Transpiler/InstCompoundIf.cs b/Wacs.Core/Instructions/Transpiler/InstCompoundIf.cs
index 9648998..45419fa 100644
--- a/Wacs.Core/Instructions/Transpiler/InstCompoundIf.cs
+++ b/Wacs.Core/Instructions/Transpiler/InstCompoundIf.cs
@@ -74,8 +74,7 @@ public override void Validate(IWasmValidationContext context)
                 // context.OpStack.PopI32();
                 
                 //Check the parameters [t1*] and discard
-                context.OpStack.PopValues(ifType.ParameterTypes, ref _aside);
-                _aside.Clear();
+                context.OpStack.DiscardValues(ifType.ParameterTypes);
                 
                 //ControlStack will push the values back on (Control Frame is our Label)
                 context.PushControlFrame(IfOp, ifType);
diff --git a/Wacs.Core/Modules/Sections/StackCalculator.cs b/Wacs.Core/Modules/Sections/StackCalculator.cs
index d42d927..3807f82 100644
--- a/Wacs.Core/Modules/Sections/StackCalculator.cs
+++ b/Wacs.Core/Modules/Sections/StackCalculator.cs
@@ -57,6 +57,10 @@ public void PushResult(ResultType types)
         public void PushValues(Stack<Value> vals) {
             while (vals.Count > 0) _context.Push(vals.Pop().Type);
         }
+        
+        public void DiscardValues(ResultType types) {
+            foreach (var type in types.Types.Reverse()) PopType(type);
+        }
 
         public Value PopI32() => _context.Pop(ValType.I32);
         public Value PopI64() => _context.Pop(ValType.I64);
diff --git a/Wacs.Core/Modules/Sections/StackRenderer.cs b/Wacs.Core/Modules/Sections/StackRenderer.cs
index 4e30e72..caf1444 100644
--- a/Wacs.Core/Modules/Sections/StackRenderer.cs
+++ b/Wacs.Core/Modules/Sections/StackRenderer.cs
@@ -60,6 +60,10 @@ public void PushResult(ResultType types)
         public void PushValues(Stack<Value> vals) {
             while (vals.Count > 0) _context.Push(vals.Pop().Type);
         }
+        
+        public void DiscardValues(ResultType types) {
+            foreach (var type in types.Types.Reverse()) PopType(type);
+        }
 
         public Value PopI32() => _context.Pop(ValType.I32);
         public Value PopI64() => _context.Pop(ValType.I64);
diff --git a/Wacs.Core/Validation/ValidationOpStack.cs b/Wacs.Core/Validation/ValidationOpStack.cs
index bed1870..2a4db83 100644
--- a/Wacs.Core/Validation/ValidationOpStack.cs
+++ b/Wacs.Core/Validation/ValidationOpStack.cs
@@ -46,6 +46,8 @@ public interface IValidationOpStack
         Value PopAny();
 
         void PopValues(ResultType types, ref Stack<Value> aside);
+        void DiscardValues(ResultType types);
+        
         public void ReturnResults(ResultType type);
     }
 
@@ -258,6 +260,14 @@ public void PopValues(ResultType types, ref Stack<Value> aside)
                 aside.Push(PopType(type));
             }
         }
+        
+        public void DiscardValues(ResultType types)
+        {
+            foreach (var type in types.Types.Reverse())
+            {
+                PopType(type);
+            }
+        }
 
         public void ReturnResults(ResultType types)
         {