In the corner on our right, weighing in at 205 pounds, the former UFC Light Heavyweight Champion Chuck Liddell. And in the corner on our left, covered in tattoos and weighing in at a cumulative 450 or so pounds, the challengers, Atreyu.

Of course, even though the testosterone was flowing like a river, the dudes were all just sparring and no one was hospitalized. But if this were an actual fight, it would take all the members of Atreyu armed with clubs and all the dudes in Avenged Sevenfold wielding knives to take out Liddell.

The reason Atreyu singer Alex Varkatzas and guitarists Dan Jacobs and Travis Miguel were in the ring with the UFC fighter was they were the subjects for the cover story for Revolver's upcoming "Ultimate Fighting Issue," which hits newsstands January 20. In addition to a blow-by-blow account of the training session, the issue features Tool frontman Maynard James Keenan, Chimaira vocalist Mark Hunter, Dragonforce guitarist Herman Li and Senses Fail frontman Buddy Nielsen talking about their own experiences training in mixed martial arts. There's also a story called "When Rockers Attack," which chronicles the fist-flinging exploits of some of the biggest, and baddest dudes in rock and metal.

Click "more" to watch video of Atreyu going head to head against Liddell. Read more...