When I was in college I went to a Simon and Garfunkle concert where Paul wanted to sing a song he'd written, and Art didn't. After several go-arounds where Paul would introduce it and Art would start playing something else, Paul started in on the song alone. Art looked at him for a minute, set his guitar down, walked behind Paul on the stage and stood on his head. All the change fell out of his pockets. As Paul turned around to see what the noise was, the audience just howled and Paul had to blow off the song for the night (seems like it was a serious sad love song or some such).
Blessings,
Barbara