Here's the top 20 knockouts in UFC history.
Oooh, that was a cheapshot!
They each land a perfect punch at the same time.
6 seconds and a nasty left hook is all this guy needed to knock 3 guys out.
One of the best parts of GTA V is just going around punching people out.
Check out what happens to this boxers face when he takes a punch to the head.
Here's a compilation of some powerful slow motion knockouts during MMA bouts.
Boom right to the kisser!