Roger Federer, in a Gillette photo shoot, has a volunteer stand across the room from him, and proceeds to knock a can off the man's head with a tennis serve. Not once, but twice.
Everyone's seen the classic video of Tiger Woods bouncing a ball off his club, then launching a shot for a Nike commercial. Heisman candidate Mark Ingram nearly matched it in a recent video. I think this is right up there with that.