re: #577 Charles
Correction: there is such a standard, but it has nothing whatsoever to do with this case.
Speaking from WA stand point, I don’t know about CA.
In a situation where someone, the biter, was confrontational and “in my face”, I could justify a shove to back him up. I could not justify a closed fist.
Other jurisdiction in the same case would require me to back up first and try to disengage even before a shove.
Either way a closed fist as a response to some one “in my face” isn’t “reasonable.”