AHHHHHH! I think I've seen that done before by the Improv Team at my college. But I don't recall ever playing it myself. It definatley sounds like fun!

The one I always enjoyed was one were we set up a scene and then were each given a card from your standard 52 deck and whatever the value of your card was your how important you were int eh scene. So it would always end up being hilarious when like the boss would get a 2 and the homeless bum gets the King or something like that!