In the dream, I was at the supermarket, in the checkout line. There were some Bad Sorts in suits who were quite obviously Up To No Good. Somehow, with my infinite brainpower, I managed to ascertain that they were about to unleash an army of zombies on the supermarket. I very calmly finished checking out and headed for the door.
As I got to my car, I looked behind me and saw the zombies walking toward the other entrance, on the opposite end of the store. Some of them saw me getting into my car and started toward me. It was like I was looking at them through a strobe light. First they were walking, then they were jogging, then full-on running. I slammed my car into reverse and headed out of the parking lot at a speed some might term reckless.
I woke up then because I had to pee. Luckily, most of the time when I have nightmares like that, I'm aware that it isn't real, so I don't panic too badly. It's still unpleasant, though, to dream about the walking dead, let alone the running dead.