There is a new tactic being employed by carjacking theives. They leave a piece of paper or note on the back window of your car. You don't notice it until you start to back up. Then you put the car in park, but leave it running, and get out to see what it is. At this point a carjacker jumps into the driver's seat and takes off along with your purse, wallet, and house keys.
If this happens to you, just keep driving and don't stop until you arrive at your destination.