Philip Glass and John Cage

Said young Philip Glass to his men,

"That sounded good, play it again.

And again and again

And again and again

And again and again and again."

Inspired by something I read about John Cage saying he considered audience noise to be part of the composition: 

One evening in Paris Cage sat

Down to dinner at Boulez's flat.

But ere they could start,

Pierre launched a fart.

Sniffed Johnny, "I coulda wrote that!"