There's nothing quite like a knockout in the Ultimate Fighting Championship. The league only uses four-oz. gloves, therefore strikes are much more devastating than in boxing. Of course, then there are the vicious kicks, and when they connect, it's serious "lights out." Witness the league's biggest stars such as Anderson Silva, Quinton Jackson, Lyoto Machida, and Wanderlei Silva ending fights. 64 min. Widescreen; Soundtrack: English.