diff --git a/src/net/torvald/terrarum/IngameInstance.kt b/src/net/torvald/terrarum/IngameInstance.kt
index 7944866aa..ff1be3e7a 100644
--- a/src/net/torvald/terrarum/IngameInstance.kt
+++ b/src/net/torvald/terrarum/IngameInstance.kt
@@ -71,7 +71,7 @@ open class IngameInstance(val batch: SpriteBatch) : Screen {
 
     protected val terrainChangeQueue = Queue<BlockChangeQueueItem>()
     protected val wallChangeQueue = Queue<BlockChangeQueueItem>()
-    protected val wireChangeQueue = Queue<BlockChangeQueueItem>()
+    protected val wireChangeQueue = Queue<BlockChangeQueueItem>() // if 'old' is set and 'new' is blank, it's a wire cutter
 
     override fun hide() {
     }
@@ -161,9 +161,9 @@ open class IngameInstance(val batch: SpriteBatch) : Screen {
      * @param old previous settings of conduits in bit set format.
      * @param new current settings of conduits in bit set format.
      */
-    open fun queueWireChangedEvent(new: ItemID, position: Long) {
+    open fun queueWireChangedEvent(wire: ItemID, isRemoval: Boolean, position: Long) {
         val (x, y) = LandUtil.resolveBlockAddr(world, position)
-        wireChangeQueue.addLast(BlockChangeQueueItem("", new, x, y))
+        wireChangeQueue.addLast(BlockChangeQueueItem(if (isRemoval) wire else "", if (isRemoval) "" else wire, x, y))
     }
 
 
diff --git a/src/net/torvald/terrarum/Terrarum.kt b/src/net/torvald/terrarum/Terrarum.kt
index c73fafa02..fba8b0dd6 100644
--- a/src/net/torvald/terrarum/Terrarum.kt
+++ b/src/net/torvald/terrarum/Terrarum.kt
@@ -582,8 +582,9 @@ inline fun printStackTrace(obj: Any) = printStackTrace(obj, System.out) // becau
 
 fun printStackTrace(obj: Any, out: PrintStream = System.out) {
     if (AppLoader.IS_DEVELOPMENT_BUILD) {
-        Thread.currentThread().stackTrace.forEach {
-            out.println("[${obj.javaClass.simpleName}] ... $it")
+        Thread.currentThread().stackTrace.forEachIndexed { index, it ->
+            if (index >= 3)
+                out.println("[${obj.javaClass.simpleName}] ... $it")
         }
     }
 }
@@ -631,4 +632,9 @@ class UIContainer {
 
 interface Id_UICanvasNullable {
     fun get(): UICanvas?
-}
\ No newline at end of file
+}
+
+// haskell-inspired array selectors
+// head and last use first() and last()
+fun <T> Array<T>.tail() = this.sliceArray(1 until this.size)
+fun <T> Array<T>.init() = this.sliceArray(0 until this.lastIndex)
\ No newline at end of file
diff --git a/src/net/torvald/terrarum/gameworld/GameWorld.kt b/src/net/torvald/terrarum/gameworld/GameWorld.kt
index c0c7a74a8..5f674aad9 100644
--- a/src/net/torvald/terrarum/gameworld/GameWorld.kt
+++ b/src/net/torvald/terrarum/gameworld/GameWorld.kt
@@ -324,7 +324,7 @@ open class GameWorld : Disposable {
         wirings[blockAddr]!!.wires.add(tile)
 
         if (!bypassEvent)
-            Terrarum.ingame?.queueWireChangedEvent(tile, LandUtil.getBlockAddr(this, x, y))
+            Terrarum.ingame?.queueWireChangedEvent(tile, false, LandUtil.getBlockAddr(this, x, y))
     }
 
     fun getAllWiresFrom(x: Int, y: Int): SortedArrayList<ItemID>? {