Dustin Poirier (20-4) and Bobby Green (23-7) took to the Octagon to open UFC 199, and we got a first-hand lesson of why it's best not to show off when you're mixing it up.
Videos by FanBuzz
Green did a little Muhammad Ali shuffle before the fight began, did a terrible impression of the rope-a-dope and showed off before getting pummeled.
Maybe next time, he'll think through showing off when he's actually in a fight.
