Years ago, I went to the drive in theater. My GF was working, and didn't want to see whatever crappy movie I was going to see anyway, so I took my dogs and went alone. I open carried, but it was hot and I just didn't want to lug around a 6" DW .357 (My one and only gun at the time), so I was unarmed, at least gun wise. I never saw, or heard him coming, but suddenly, a very big, and very drunk hispanic guy grabbed me by the hair (It was long then, and I had a lot of it), and starts trying to pull me out of my truck. My dog, who showed no signs of ever defending me in the past, he loved everyone, suddenly bit him on the hand and wrist, twice. These were full power bites from a 95 pound dog, and the guy yelped like a dog himself!
Suddenly his brother appears and it turned out he had exited to the wrong theatre (there were 5 screens) and thought I was stealing his brother's truck. It was the same year, model, and color, as mine was. I thought, "I'm gonna get sued, but the sober brother said that his brother deserved it, and that my dog was just doing his job. I never heard from them again. Those were very bad bites, and I always wondered what happened.
From then on, I've become much more aware of my surroundings, and I am always armed with something, usually a knife at least. I find myself doing the "Now what would I do if this guy walking towards me tried to take my car?" thing a lot. It's never happened, but I did make the mistake one time of laughing at a guy and his two year old wearing "clownish" matching outfits. The guy got all upset, and we wound up fighting between our cars. I was a lot bigger than he was and just about the time I got him down for good, here comes the mounted police on their horses, telling me to stop. He wasn't hurt all that badly, and we both refused to file charges on each other. The two cops laughed at the matching outfits too. He finally "got it" and we shook hands and left.