I guess this goes down as a “no decision” or a “no contest” due to double knockout? During all of my years watching MMA I have never seen this happen before, but I’m sure it has, I’m actually surprised it does not happen more often. Two guys throw a punch at the same time, both guys connect, both sets of lights go out. It’s not inconceivable. This was a fight between Aaron Britt and Brandon Alexander at a smaller promotion in California. If this was a Rocky movie, Rocky Balboa gets to his feet at the 9 count, winning the title.
UPDATE: This one, shown on Inside MMA with the legendary Bas Rutten on studio commentary, is even better: