A death metal band covers John Cage's 4'33".

Death metal band Dead Territory covers John Cage's seminal 4'33". (via Rabih Alameddine)

Often thought of as four and a half minutes of silence, Cage's piece is in fact anything but. As the composer said of its 1952 premiere:

They missed the point. There's no such thing as silence. What they thought was silence, because they didn’t know how to listen, was full of accidental sounds. You could hear the wind stirring outside during the first movement. During the second, raindrops began pattering the roof, and during the third the people themselves made all kinds of interesting sounds as they talked or walked out.

See also: Nils Frahm covers 4'33".