Apparently, those models have been experiencing problems with a defective ignition switch, which releases the key even if the vehicle's transmission isn't in park. Needless to say, this can cause vehicle movement when it certainly isn't desired (i.e., when you're not actually in the car, piloting it).

About 40,000 of the models are being recalled to fix the situation. Chrysler owners can contact their customer service department at 1-800-CHRYSLER (800-247-9753).