Now this is truly incredible. Firstly because everybody seems to know the rest of the notes without being told. How do they do that? And, secondly, it's amazing to see Bobby McFerrin, a man who obviously eats, sleeps and breathes music, doing what comes naturally. You'd never guess what he's capable of by listening to "a little song he wrote..."
World Science Festival 2009: Bobby McFerrin Demonstrates the Power of the Pentatonic Scale