function not found Chael Sonnen is known for his epic smack talk leading up to fights.  Some say it’s scripted and pre-written but the former UFC middleweight and light heavyweight contender went impromptu on a heckling fan at the UFC Fan Expo in Las Vegas leading up to the UFC 162: Silva vs. Weidman Independence day weekend event. Sonnen wins by verbal knockout. Be sure to  Like MMAWeekly.com on Facebook  and  Follow @MMAWeeklycom on Twitter .