Dramatic footage shows UFC star Stephan Bonnar being pinned to the ground and cuffed by police as he was arrested for driving under the influence last Sunday (October 28). <br /><br />The fighter, nicknamed ‘The American Psycho’, was detained Sunday afternoon in Las Vegas after motorists reported his “erratic” driving at 90mph. <br /><br />Witness Katie Dyer, 29 said: “If nobody had stopped him I think he would be dead. He was going to hit something, whether it was a car or a wall, and another person could have died.”