Get back to your parked car, get in, start motor (lovely noise isn't it!), into reverse, look in mirror and notice paper form or similar stuck to outside of back window. Get out to remove it and some scumbag(s) jumps into car (engine probably running) and off goes your car, briefcase, laptop, house keys etc etc.... If you have HOME programmed into sat nav, even better.
Just something else to be aware of with cars like ours.
Cheers, MartynC