I was sitting at a stop light about 9:30 last night smoking a cigarette. A bum who was pan handling at the intersection walked up to me and asked me for one. I said no. He stepped closer and asked again, then he saw the pack sitting in my console and reached for it. I grabbed his wrist with my left hand and my HK with my right. I said something to the extent of "you better get the fuck out of my car right now". He withdrew immediately mumbling a bunch of whoas, heys, and easys. At this point the light was green and I left. Jesus christ, what an adrenaline rush. I didn't have time to think about anything I was doing it just kind of happened. I'm lucky that he didn't have a knife and stab me, that's been happening a lot downtown recently and he had more than enough opportunity to.