Fall Out Boy bassist Pete Wentz has been caught up in another brawl, after trading punches with a heckler at an industry-only gig in the early hours of yesterday (12Jun07) morning. The band were playing to 200 invited guests at a Spin magazine party at Chicago, Illinois club Schuba's following a gig at the nearby Charter One Pavilion venue. But Wentz became involved in a fight as the band tried to leave the club. He tells MTV, "The guy was heckling me and the band, so were other people, most in good fun. "But we get heckled onstage all the time, and while I'm a jerk, I'm not the kind of person who would ever lash out at someone simply over this. "The truth is on the way out the door I had to pass directly next to the guy and I knew it, so I kept my head down and walked out. As I did, the guy reached out and grabbed me and said something I couldn't really hear - it was a glorious use of the English language, though. "As he grabbed me, I punched him. Yell all you want at me, say whatever, but in a situation like that I will defend myself. "After that, of course, it got chaotic, (but) we have several independent witnesses that gave statements saying he grabbed me first. "I am not worried over the outcome, as I was clearly in the right. Anything anyone else is saying or writing is simply not true." In January (07), Wentz was involved in a fracas with a security guard at a concert in Albuquerque, New Mexico.