I'm new to this site. I was in search of scenarios to consider regarding self-defense and CCW. If this thread is any example, I think I found what I was looking for.
As for what I would do - I'm a middle-aged woman (Ooh, I hate saying that), 5'8" and weight about a buck and a half. If I'm carrying or not, I now always have a knife available (my husband thinks I'm nuts). I'd like to think I would have done something to help the cell phone guy as he did not do anything to warrant a beating like that. Also, I live in Kansas and the eminent danger of self or others rule does apply - and I would have considered this fella in eminent danger. So I like HazCat's approach - pulling my pistol, yelling stop and shooting him - you certainly would not want to just warn him off and have him waiting for you in the parking lot later.
But, there are a lot of variables that are not known here - the guy was outside, perhaps waiting with friends in the parking lot, so you're not just dealing with one giant crazy dude and a mouthy broad, but perhaps a lot of giant crazy dudes (they travel in packs you know). You also have to consider all the bystanders in the restaurant and the close quarters. If this guy does have friends and you shoot him, they are not going to just come in asking questions, they may come in blazing, potentially killing or wounding a lot of people. I'm hearing "Spock" logic in my head right now - "The needs of the many outweigh the needs of the few".
So, looking at this logically, perhaps calling 911 and being a good witness is the best approach here. Not really my personality, but now that I carry regularly, I'm trying to consider all the consequences. Having said that - if one or two of the other big guys in the place tried to stop the attack, I would have grabbed anything I could find to help them out. It’s just too bad for the cell phone guy that there weren't men like Solus or Marshal'ette's son's in the restaurant when this happened.