One guy appears to be very seriously hurt because, after the dust has settled and he is laying on the ground, he gets a wind up soccer kick to the head (viewable at a few different points in the videoi - around like 1:15 and 1:40, for starters).

I think... it has to be understood that maybe some guys deserve to get smacked about a bit but... any moment you wind up and soccer kick a downed opponent in the head, you need to be in a jail cell for crying out loud.