Pretty cool...

On June 12, 2009, vocalist Bobby McFerrin participated in a panel discussion called “Notes & Neurons: In Search of a Common Chorus” at the World Science Festival. As part of the discussion, he performed an amazing feat — he trained an audience, in mere seconds, to become a sort of human keyboard. In the video...

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World Science Festival 2009: Bobby McFerrin Demonstrates the Power of the Pentatonic Scale from World Science Festival on Vimeo.

http://www.mentalfloss.com/blogs/archives/41186

Also, I wonder if he's still living off "Don't Worry Be Happy?"

That.

Was.

Fawesome.