Uriah Hall Delivered One of the Most Violent UFC Knock Outs Ever After the most violent televised knockout in combat sports history, Uriah Hall’s overriding emotion was fear. He was fearful he may have killed Adam Cella with the spinning back kick knockout that was broadcast Tuesday on FX on Episode 3 of Season 17 of the reality series “The Ultimate Fighter.” He was fearful, at least for a moment, that the violence he had unleashed upon Cella would get him arrested. The celebration that usually accompanies a big knockout on an episode of TUF was noticeably absent. Jaws dropped around the gym as fighters and observers feared for Cella’s well-being. Watch below and see for your self how things unfolded.