Thread: What's the tune at the beginning of Undead by Hollywood Undead from?

My friend had me listen to a song, it's called Undead, by Hollywood Undead. And right at the beginning there's this tune (it's actually kind of played behind everything throughout) and I know I've heard it somewhere before, but I can't remember where it was from. So if you know, could you give the the answer?

It sounds like Ozzy Osbourne's "Crazy Train".
http://www.youtube.com/watch?v=JRbPWcLode0

i know just look it up on www.youtube.com

look up 'you dont know' by eminem/50 cent/Lloyd banks.

even the drum beat matches up to the song, someone should be suing hollywood undead foreal.

here is the link:
[ame=http://www.youtube.com/watch?v=lm4V_YbJaZE]YouTube - Eminem - You Don't Know (DIRTY)[/ame]

It is not You Don't Know by Eminem... Fail. Crazy Train is 8000 times closer. And the Drum beats don't match up

IT'S CRAZY TRAIN BY OZZY [ame=http://www.youtube.com/watch?v=FGSH_BGqH2c]YouTube - Ozzy Osbourne - Crazy Train Lyrics[/ame]

It sounds like the beginning of Without Sight by Destroy the Runner. Listen to the guitar in the beginning, I wondered the same thing.