Security ... think about it!
One night the motion detector went off and we panned over to see a pedestrian. Not unusual, and given that it was a quiet night, we panned along with him to see make sure he had no intention of making mischief. He wandered into the next lot and stopped to pick something up, then seemed to loiter near a car. Before long we could see something bright in the car and we could tell it was on fire.