LAS VEGAS – After arguably one of the most vicious knockouts in UFC history, Mauricio Ruffy knows exactly what he wants next. Ruffy (12-1 MMA, 3-0 UFC) landed a spinning heel kick on King Green (32-17-1 MMA, 13-12-1 UFC) a little more than two minutes into their main card opener Saturday at UFC 313 . Green, who has turned out many lights himself, was out cold, face first on the canvas . Ruffy, a member of Brazil’s fast-rising Fighting Nerds team, won a $50,000 performance bonus for the finish, which is sure to be a Knockout of the Year contender come December. “I’m very happy with the win and very happy with the opportunity,” Ruffy said at his post-fight news conference at T-Mobile Arena