If you haven't heard of Bobby McFerrin you're about to. Bobby McFerrin is an amazing musician, song-artist, and voice actor. If you ever saw those animated movies "How the Camel Got His Hump" or "How the Rhinoceros Got His Skin", McFerrin did every sound and musical accompaniment to those masterpieces.
In this video, Bobby plays the audience. He did this to us when I saw him in concert, laughter all-round!