Man, I hate those dreams. I had one just the other day, and it stuck with me.
I was at a gas station at night, and I suddenly noticed some unsavory fellows were eyeing me. I dove into my car and locked the doors when one pulled a knife on me. I grabbed my 9mm from the glove box, and as soon as he saw it, he pulled a little POS auto pistol from his pocket and aimed it at me through the front passenger window as I was racking my pistol. He fired first but missed. I fired back, but the first bullet only shattered the window, but didn't go any farther. I fired several more rounds quickly, but they all got absorbed by the falling shattered glass. Finally, the glass was gone, and I fired my tenth and last round, hitting him. I hadn't put him down, though, and that's when I woke up in a sweat.
I decided then and there that I need to put something in my car that has a higher capacity, and I also really wanted to start carrying on my person rather than just keeping a gun in the car.