Once in a blue moon, the unthinkable of a double knockout happens in MMA. Most of the time, it happens with a slam, but in this case it was both fighters throwing a punch at each other at the same time. This was at Shamrock FC and it turns out that the referee announced the winner of the fight as the first person woke up. This is somewhat similar to Rocky standing up in Rocky 2 when him and Apollo Creed knocked each other on the ground.
What is crazy about this is that both fighters were able to generate enough power to land a knockout punch and that each punch at the same time. You could literally say that this is the type of thing that would happen on a movie. On the next page is the video of the double knockout that took place just recently.
(click on page #2 to see the double knockout and the winner wake up)