A MMA referee knocked out the losing fighter's cornerman after the fight was over when the cornerman disagreed with the ref's decision to end the fight.
The losing fighter was in trouble so the ref stopped the fight and that is when a cornerman said something to the ref. The ref didn't like what the cornerman said and then they started to argue.
As you can see in the video, the cornerman then shoves the ref slightly and then eats a left hand that knocks him out.
Can you imagine this happening in the NFL or in the NBA?
Perhaps the cornerman and the ref have a history. Who knows?
A lot of these MMA refs train just like the fighters do and know how to knock someone out or apply submission moves.
The crazy knockout happens around the one minute mark.