UFC middleweight Brian Stann is a fighter, a Marine, and recently, a commentator for Fox. He's used to wearing many hats, so it's no surprise that during his UFC on Fuel 2 win over Alessio Sakara, he was both fighter and referee.
Stann knocked Sakara down with a bevy of knees in the first round. While in Sakara's guard, Stann knocked his opponent out with short elbows. When he saw Sakara was clearly out, he pulled back, waving to referee Marc Goddard that Sakara was knocked out.