ActionScript 1/2 :: Bouncing Ball - Move Object Using Arrow Key

I'm using the actionscript below to Move Object Using The Arrow Keys and it works fine but I want to modify it so that when I press the up key it goes to and play a movie clip. Basically it's a ball movie clip that responds to the arrow key but on the up key it plays a bouncing movieclip and everything remains aligned.

Here is the script-
var speed =5;
this.onEnterFrame =function(){
if(Key.isDown(Key.UP)) {
circle._y -= speed;
} if(Key.isDown(Key.DOWN)) {
circle._y += speed;
} if(Key.isDown(Key.LEFT)) {
circle._x -= speed;
} if(Key.isDown(Key.RIGHT)) { 
circle._x += speed;
}};