Mixed martial arts hasnt been dubbed the worlds fastest growing sport for nothing. Its noticeably rocked the sporting world since the creation of the Ultimate Fighting Championship nearly two decades agoand has even shaken up the pop culture scene. Who would have expected popular MMA fighter Chuck Liddell to trade in his sparring gloves for dance shoes on "Dancing with the Stars"? A combo of grappling, punching, kneeing, and kicking, this sport looks like it will be grounding and pounding, sprawling and brawling, for some time to come.