Obligatory Didn't see this posted anywhere else, sorry if...
BLUF: Seemingly inebriated Florida man videoed in a verbal with restaurant staff gets all head-butty, customer politely wraps him up.
Full story here: https://heavy.com/news/2020/05/joel-michael-singer/
Other than being a nice example of a shitbird getting his due, it's also a good look at a physical intervention gone right, where force was used I'd argue capably and proportionately, intervener maintained his cool, adjusted when necessary, worked effectively to control the situation and bring it down a notch if possible, and didn't get sucked in to taking it personally and losing advantage.
It certainly helps he was physically able and with some skill to rely on (high school wrestler, per article), which might be grist for our particular mill vis-a-vis what if those factors weren't in play, or if the douche brought more to the fight, or if the intervener was carrying and things hadn't gone in his favor, etc.
All the usual interesting things to observe, applaud or criticize, and play "what if" with that helps us think through these things, but with a good video to work from...
...but mostly just nice to see it go the way it did.