diff --git a/Projekte/mdga/client/src/main/java/pp/mdga/client/animation/ActionControl.java b/Projekte/mdga/client/src/main/java/pp/mdga/client/animation/ActionControl.java
index eb741e9e..542a1f9c 100644
--- a/Projekte/mdga/client/src/main/java/pp/mdga/client/animation/ActionControl.java
+++ b/Projekte/mdga/client/src/main/java/pp/mdga/client/animation/ActionControl.java
@@ -12,7 +12,8 @@ public ActionControl(Runnable runnable){
 
 
     protected void action(){
-        if(runnable == null) throw new RuntimeException("runnable is null");
-        else runnable.run();
+        if(null != runnable) {
+            runnable.run();
+        }
     }
 }
diff --git a/Projekte/mdga/client/src/main/java/pp/mdga/client/board/BoardHandler.java b/Projekte/mdga/client/src/main/java/pp/mdga/client/board/BoardHandler.java
index 4cdbb3af..08ee128c 100644
--- a/Projekte/mdga/client/src/main/java/pp/mdga/client/board/BoardHandler.java
+++ b/Projekte/mdga/client/src/main/java/pp/mdga/client/board/BoardHandler.java
@@ -831,7 +831,7 @@ private void throwBomb(UUID uuid) {
     }
 
     private void throwMatrix(UUID uuid) {
-        //app.getAcousticHandler().playSound(MdgaSound.MATRIX);
+        app.getAcousticHandler().playSound(MdgaSound.MATRIX);
         Spatial piece = pieces.get(uuid).getSpatial();
         piece.addControl(new MatrixAnimation(app, radarPos,()-> {
             piece.addControl(new FadeControl(1,1,0,
diff --git a/Projekte/mdga/model/src/main/java/pp/mdga/client/gamestate/turnstate/choosepiecestate/WaitingPieceState.java b/Projekte/mdga/model/src/main/java/pp/mdga/client/gamestate/turnstate/choosepiecestate/WaitingPieceState.java
index 6f88dfd5..86bcc509 100644
--- a/Projekte/mdga/model/src/main/java/pp/mdga/client/gamestate/turnstate/choosepiecestate/WaitingPieceState.java
+++ b/Projekte/mdga/model/src/main/java/pp/mdga/client/gamestate/turnstate/choosepiecestate/WaitingPieceState.java
@@ -27,7 +27,6 @@ public WaitingPieceState(ClientState parent, ClientGameLogic logic) {
     @Override
     public void enter() {
         moveablePiece = null;
-
     }
 
     @Override