diff --git a/debug.cpp b/debug.cpp
index ecda4c40..daf9d056 100644
--- a/debug.cpp
+++ b/debug.cpp
@@ -191,9 +191,13 @@ bool applyCheat(char u, cell *c = NULL) {
     return true;
     }
   if(u == 'Z') {
-    flipplayer = false;
-    mirror::act(1, mirror::SPINSINGLE);
+    if (flipplayer) {
+      cwt += cwt.c->type/2;
+      flipplayer = false;
+      }
     cwt++;
+    mirror::act(1, mirror::SPINSINGLE);
+
     wavephase = (1+wavephase) & 7;
     if(shmup::on) shmup::pc[0]->at = Id;
     return true;
diff --git a/flags.cpp b/flags.cpp
index a37e11a3..a4abd731 100644
--- a/flags.cpp
+++ b/flags.cpp
@@ -213,10 +213,6 @@ bool isDemon(cell *c) {
   return isDemon(c->monst);
   }
 
-bool isWormHead(eMonster m) {
-  return m == moWorm || m == moTentacle || m == moHexSnake || m == moDragonHead;
-  }
-
 bool isWorm(eMonster m) {
   return m == moWorm || m == moWormtail || m == moWormwait || 
     m == moTentacle || m == moTentacletail || m == moTentaclewait ||
@@ -651,10 +647,6 @@ bool survivesFire(eMonster m) {
     isDragon(m) || m == moShadow;
   }
 
-/* bool survivesMine(eMonster m) {
-  return ignoresPlates(m) || isFlying(m);
-  } */
-
 bool survivesWall(eMonster m) {
   return isGhost(m);
   }
diff --git a/game.cpp b/game.cpp
index eddb812f..438c6274 100644
--- a/game.cpp
+++ b/game.cpp
@@ -1422,12 +1422,14 @@ bool monstersnear(cell *c, cell *nocount, eMonster who, cell *pushto, cell *come
     comefrom->wall = w;
     c->wall = waBigStatue;
     }
-  if(who == moPlayer && c->wall == waThumperOn) {
+  else if(who == moPlayer && c->wall == waThumperOn) {
     c->wall = waNone;
     b = monstersnear2();
     c->wall = waThumperOn;
     }
-  b = monstersnear2();
+  else {
+    b = monstersnear2();
+    }
   stalemate::moves.pop_back();
   return b;
   }
diff --git a/hyper.h b/hyper.h
index 1ea99f2c..f1a1643b 100644
--- a/hyper.h
+++ b/hyper.h
@@ -461,7 +461,6 @@ bool isCrossroads(eLand l);
 enum orbAction { roMouse, roKeyboard, roCheck, roMouseForce, roMultiCheck, roMultiGo };
 void moveItem (cell *from, cell *to, bool activateYendor);
 void uncoverMines(cell *c, int lev, int dist);
-bool survivesMine(eMonster m);
 void killMonster(cell *c, eMonster who_killed, flagtype flags = 0);
 void toggleGates(cell *ct, eWall type, int rad);
 bool destroyHalfvine(cell *c, eWall newwall = waNone, int tval = 6);