Zack de la Rocha

Some of these rockers left on their own and others were fired but their departures still shocked the rest of the world regardless.

These rock and metal singers left the bands they were in and then came back years later for another round (or multiple).

See why they're against the use of the technology.

The New York fusion band selects the best.

See what the singer had to say.

See fan-captured footage from the gig.

Before the 'machine' started up.