Tom Cruise's New Moon audition.
Yes, OF COURSE it's a joke. The guy's impersonation is so good that I found myself hating him as if he were actually guilty of being the real Tom Cruise! Poor guy. I hope people don't throw things at him on the street.
Oh, and I should note that I'm rather proud that I didn't recognize most of the quotes -- clearly, I've managed to avoid much of the TC oeuvre. YES. I RULE.