This guy happened to pick a fight with the wrong security guard in London. From what I see is this group getting escorted out for whatever reason and 1 guy is the one that is being really loud and physical. It looks like security is keeping his hands off him and not forcing the issue but him and his crew are getting in the security's faces. The man for whatever reason then approaches the biggest security after already being physical so the security swings and KO's him with one punch. The security who knocked him out happens to be former british Heavyweight Champion who once fought Mike Tyson in his career. WOAH! Wrong guy to mess with, he could of probably gone a good 7 rounds with anybody or everybody.