The Person Who Forgets the Parking Brake
Ever see somebody's car sticking out in the middle of the road with nobody in it? Or maybe you saw a car oddly creeping down a slight hill ... again, with nobody in it? There are plenty of absent-minded, in-a-hurry people who will remember to put up the windows, will remember to put the car into neutral, and will remember to grab the bag in the back seat, but then forget to pull up that ever-so-important stick in the middle of the car. The result isn't going to be pretty for that person.