VEHICLE STOPPED IN PARKING LOT WITH ENGINE RUNNING. TOOK FOOT OFF BRAKE TO ACCELERATE, AND ENGINE REVVED UP, AND VEHICLE TOOK OFF. APPLIED BRAKES, DID NOT STOP VEHICLE. IT SPED UP TO 60 MPH, HIT CARS/ FENCE. FINALLY, STOPPED VEHICLE. VEHICLE STILL AT DEALER, DAMAGE UNKNOWN, CHRYSLER CONTACTED, SAID FILE OPENED. *AK