4'33"

In front of an audience, a pianist opens the lid of a piano, a little later without playing any notes, he closes the lid.

The same pianist opens the lid again, sits calmly and looking at his wristwatch, and closes the lid without playing.

And he does it again, for the third time in a row. What is the world is this piece of music called?

4'33"

Apparently, it's a real piece of music, and someone has been sued before for crediting John Cage with his music in a minute of silence.

Absurd? Obviously.

And even weirder, you can listen to 4'33" here.