GuitarHeroFailure is actually quite good at Guitar Hero, and uploaded a video of himself playing Ozzy Osbourne's 1983 metal classic "Bark at the Moon" to show off his skills. But because of the copyrighted audio, YouTube promptly took his video down—so GHF found a way around the rules. I recommend you play the video before reading on, so I don't spoil it for you.
I don't even know what you'd call this. It's not really beatboxing, and it's not humming, either. It's some guy dorkily making wah-wah guitar sounds with his mouth, and it's hysterical. None other than early YouTube star Tay Zonday (of "Chocolate Rain" fame) commented on the video, calling it "the PERFECT poem to the insanity of our current copyright laws. "
Don't forget to turn on closed captioning. As of press time, neither Epic Records nor Ozzy himself have responded to email and Twitter requests for comment.