You couldn't have ever been in a legit fist fight. Adrenaline is a bitch. It does some pretty wild things to humans. In the heat of the moment with that adrenaline flowing, you're not gonna have a fuckin clue if your opponent is really out. The refs job is just that... The refs job. The fighters continue until they are told to stop and/or pulled off the opponent. Period. End of conversation. Literally, in the contracts.