For more than 25 years, Johnny Knoxville has been putting his body (and brain) on the line for the sake of entertainment. As part of the stunt crew Jackass, he has amassed 16 concussions, and fractured ribs, wrists and his skull across the franchise’s several films and TV shows. This year, he’ll put it all on the line once again with the group’s final outing, Jackass 5.