Speaking of everyone's favorite Zen Buddhist I-Ching Chance Musician, John Cage, Boing Boing pointed out this excellent clip of a young John Cage performing "Water Walk" on the old 50's game show, I've Got A Secret.
Cage's beatific encouragement to his audience for them to laugh is part of what makes this so great: this was a guy who completely believed in what he was doing, but never flinched from his work's inherent ludicrousness.