He may be a Jackass, but he's no fool. That's what's we discovered at the photo shoot for Spin's September cover story. At a swank Manhattan hotel, the actor/stuntdude embraced the debauched rock star theme and ran (sometimes pants-less) with it. Knoxville was in fine form, even setting fire to his hand for one of the most spectacular shots. Here are some exclusive web-only outtakes from the shoot (along with a few movie stills). For the complete story behind Jackass Number Two, pick up the September issue of Spin -- on sale now!