The standard is suposed to be beyond a reasonable doubt. It's also if an average rational person would have feared great bodily harm or death. I think he showed amazing restraint once the mob was chasing him, kicking him in the head, and clubbing him with a skateboard. If you lose consciousness to one of those blows its reasonable to think that mob would do you great bodily harm. Anything that could render you unconscious is a threat to your life in that situation.
