CAR ROLLED DOWN SLIGHT HILL AFTER TURNING OFF AND EXITING VEHICLE, TRANSMISSION SHIFTER APPEARED TO BE IN PARK BUT OBVIOUSLY NOT AS CAR ROLLED AFTER LEAVING ALONE ON SLIGHT SLOPE. AFTER ACCIDENT, I PLACED KEY IN IGNITION, STARTED CAR BUT WILL NOT BACK UP OR CHANGE POSITION OF GEAR FROM NEUTRAL OR DRIVE. WILL NOT GO BACK INTO PARK. KEY WILL NOT COME OUT OF IGNITION NOW. BUMPER AND RADIATOR ARE DAMAGED AFTER CRASH. *TR