Back when I delivered pizzas, one of my fellow drivers was on a run.
About 2 hours after we all tried to call him and get ahold of him, I drove out to the last house to where he delivered the pizza. As I was about half way there, I saw a bunch of police cars, an ambulance, and a firetruck. In the middle was his vehicle, and a bunch of "crime scene" tape around the area. I thought "oh shit, something happened to him". After stopping and asking an officer what had happened, I was able to talk to him. He told me that some guy had walked up to his car at the stop light and got into his car passenger door, said "Fucking go or i'll kill you" and had a kitchen knife in his hand. "No problem" my friend said, reached underneath his seat, pulled out his 1911, and put 3 holes in this guy.
He ended up selling his car, and the DA for the county didn't bring up charges becuase it was justifiable homicide in a self defence situation.
Sure an glad I wasn't the one to take that run.