Both women are overreacting here. Obviously the cop is as well. Make up your own mind about whether the punch was warranted. I think you could make a case that by the time the punch was thrown, the cop justifiably felt he was losing control of the situation. (And hey, at least he didn’t use his Taser.) Seems to me that the mistake came earlier: This started as a jaywalking citation. Was it it really so important that the woman get a jaywalking fine that she needed to be chased down and thrown against the patrol car? Even if she was trying to avoid the fine, seems like at some point you realize what’s at stake here (a single incident of someone undermining your authority to get away with a petty crime), and just let it go.