They were fast to receive medical attention. He should be OK. I hope. It's usually the delay that causes the serious problems which is not the case here.
We made fun about him. I thought, he was acting an buying time after the rabbit punch. Never judge a situation to early...
It just too sad. Too hard to say why it happens. it's not only punches. Some people have vascular malformations that makes them more susceptible to develop bleeding. Evacuation of a subdural hematoma its normally an easy job but it will depend on where and how much he is bleeding. Also we don't know how high the intracranial pressure got before he got to the OR. We can only pray.....