Should he have to be telling the referee that the guys is unconscious? Isn't the basic function of that guy to keep everyone safe if they can't defend themselves? I mean if you need to be told "hey this guy is unconscious" maybe you shouldn't be in charge of safety.
To be fair to the ref, the guy's moving, he doesn't look like he's out until the opponent get's off him.
I bet if the camera panned right you would have seen the ref screaming "kill him!"