I just saw the movie Idiocracy, and it was hilarious.
One thing is driving me nuts. Toards the end of the movie
Luke Wilson is about to crushed in an arena, and there is a
an orchestra comprised of only guitars, playing this one power
chord riff over and over.
I cant find the name of it anywhere on the net.

Does anyone know the name of the song?
Any help appreciated.
Gentlemen, I know this is a 10 year old bump, but I finally got around to seeing this movie, and when I heard that riff I exclaimed, "What song is that?! I know that song..." The consensus in the room was that they just made up the song for the movie, but I knew I heard it before.

After racking my brain for about 15 minutes, I realized it was one of 'The Doors' songs. Finally I found it: "The Changeling"

The riff in the movie is like a heavy metal rendition of it, but if you take a listen, you'll definitely hear it, although it's really more of a keyboard part.