The short version:
I was attacked by 3 gangster wanna bes about a year ago who were high on drugs and drunk. It was a case of mistaken I.D. and they were out for my blood. Knives were pulled on me and I subdued them with pepper spray and some martial arts. I ran before they could see again. I suppose I got some minor fame with the street crowd in my town for having the guts to take them on but I have no pride in it. I just did what I needed to do and I'd do it again.
I wouldn't have been likely to even pull a gun if I'd had my permit to carry one back then, so I still carry pepper spray as a primary defense. It is effective, at least in some cases.