Well, here is something you don't see every day.

Why is it that these bands always do this type of thing at shows that I am not at? There are so many bands that I would love to see a collaboration with, and seeing this was pretty awesome.

Slipknot & Korn were recently on tour together in the United States, and then brought the tour to London.

At Wembley Arena on Jan. 15, Slipknot joined Korn on stage to perform a familiar tune, "Sabotage" by The Beastie Boys!

Check out the video below!