Play movie/frame when key is pressed?

Here's some code for the keyboard controls...

var keyListener:Object = new Object();
Key.addListener(keyListener);

function keyDownF(){
     if(Key.getCode() == 32){ 
         // put switch to other clip code here
         delete keyListener.onKeyDown; // to avoid repeating this function while key is down
     }
}

keyListener.onKeyDown = keyDownF;

function keyUpF(){
     if(Key.getCode() == 32){ 
         // put code to go back to car clip here
         keyListener.onKeyDown = keyDownF; // to restore the press interaction
     }
}

keyListener.onKeyUp = keyUpF;