Pop the ballon

Hi there.
I’m currently making a small layout and I’m trying to get the effect of an object (such as a ballon or anything similar) to pop when you press it.

I gave it a go earlier. I have the object. Its floating as an idle animation. You mouse over it and it enlarges but continues to float. But the next bit I just couldn’t figure out. When you click on the ballon I want to show a simple animation to give the effect its just been popped and then fade back in to start over again.

Tried a combination of buttons and movies but haven’t got anywhere with the last part. Any help?

Cheers