It's too bad about your friend, but it would be great if more clubs practiced the art of avoiding fights, or at least managing them, allowing the opponent to back off without losing face.
Some things come to mind, in order of escalation (this does not apply to criminal/drugged/psychotic types):
- being aware of one's surroundings
- minding one's own business and not aggravating possibly violent people
- defusing a possible fight by admitting you were in the wrong (even when you weren't) or by making neutral statements ("holy cow, that sounds bad -- let's take a look at the damage") with hands up in a "whoa, buddy, I'm sorry" stance, but up just in case ... and looking for potential assailant partners that may be lurking about
- if the other guy hits, to deflect in such a way as to push him away, spin him around to show that you can control him, resist him without escalating it
- if he persists, and this does not work, to get in one or two hits and move away, again allowing him a chance to back off
- if he persists again, take him down, but then back off and try to get away
Returning to topic, taking this kind of staged approach might stave off the adrenalin dump and give the martial artist a chance to look for options (e.g. shouting "hey you in the red shirt, call 911"). I just think that a club, if it teaches street self-defense, should teach the
entire process, to avoid just the kind of problem your friend ran into. Of course, this generally applies to angry, irritated opponents, not criminal/drugged/psycho types.
That's just an opinion from someone who has avoided conflict pretty well so far. It gets easier as I get older, because fewer people see me as a threat.