John Cage - 4'33"

John Cage was an American experimental composer and was an important avant-garde figure in the 20th century. Possibly best known now for his composition 4'33" from 1952. It is a three movement piece for any instrument or combination of instruments. Okay, I'm not going to break this down too much. Basically, it is three pieces of silence over the combined time of four minutes and thirty three seconds. I had never actually heard a performance of this until now... is that an oxymoron?