Hmm. I think it would have to be Sabrewulf's Stage music from Killer Instinct 2.

But seriously, it would have to be...wow, I don't know. It's definetely something by Radiohead, I just can't decide which one. It's either Fake Plastic Trees or No Surprises. Probably Fake Plastic Trees...or maybe not. Wow, this is tough. I don't know, I'll get back to you on that.