My question is was it the trainers or his coaches that told him not to continue? I watched the same trainers at the mat where a wrestler fainted and fell to the mat and he continued the match because he wanted to. I would think that if a person fainted and fell to the mat he would not be allowed to continue, because obviously there is something wrong that caused him to just drop to the mat.
Also, if the move was illegal why was it not stopped. Vlahos was allowed to do the move while the ref watched and it was not stopped until Willis screamed. So if it was illegal the ref should have blown the whistle well before the injury. That is what the ref is there for.