On Friday night, two famous grandfathers fought in a mixed martial arts match on national television for money. One of the grandfathers was Ken Shamrock , who is 51 and was knocked out in the first round by Kimbo Slice, who is 41. Many expected a depressing bout or possibly a snuff film. It was somehow both of those things, but also, it was fun as hell . So Bellator—the fight promotion that is okay with letting famous old people fight—is going back to the well.