There are two instances where I have drawn and indexed a weapon.
First was about three years ago on the way to colorado to do a little jeeping. I was traveling with my wife and kids, along with my brother in law and his family. It was a little after midnight and we stopped in Kansas City to grab some snacks and a restroom break. All the kids were sleeping at the time, and we took turns staying with them and running into the convenience store. My wife and I had returned to the trucks, and my Bro in law had just entered the store with his wife when an old beat up chevy pulled in and six obviously drunk Kid Rock wanna be's climbed out. I just got a weird feeling, and told my wife to find her cell phone and get in the truck. I got behind my trailer did a quick weapon check and tried to stay out of sight, but within sight of the store and my family. Sure enough as soon as four of the chuckle heads got in the store the started knocking stuff over and messing with the clerk. I could see my brother in law in the back of the store staying out of sight and trying to get his wife out of the restroom. As soon as she came out he started the quick determined walk out, and almost made it. Right as he got to the door the loudest dude shoved him from behind and followed him out. Things started happening pretty fast at this point. My BIL pushed his wife as hard as he could towards the truck, BG 1 pulled a knife and the two BG's still standing by the car stuck their arms back in the car windows. My BIL pulled his H&K USP and stuck in BG 1's face, and I came fast walking out from behind the trailer with my 1911 leveled at idiot's 2 and 3 (appearently I was yelling at the top of my lungs but I don't really remember that part). My BIL started saying some really ugly things to these guys. But they got the point. Knife got dropped as did a tire iron and another knife. The three dudes in the store kinda slipped out and over towards the car, I said get the F out, and all 6 left. The only injuries that occured where the scrapes my sister in law got from her husband shoving her to the pavement. We were lucky. I am glad there were two of us that night, because otherwise there would have been bloodshed.
Second time was last summer. I was in my hotel parking lot in St. Louis.I was just grabbing my luggage out of the back seat of my truck, when some one grabbed my shoulder and pulled me back. I spun around and there was a panhandler asking for some cash. I took a step back and said "Sorry buddy, just cards, no cash." He got a little worked up and said " Come on I know you got something for me!", I pulled out my LCR and said "Nope. Just this." Then he left. SOB scratched my new pickup with his back pack as he left though. Kinda ticked me off. I had just traveled all the way through IL, so I almost didn't bother putting that little gun in my pocket. But I did and now I always will. This world is too wierd to not. Both times I've been driven to draw, were situations I couldn't of dreamed up if I tried, but they happened, and If I hadn't been prepared I'm not sure what would of gone down.