VEHICLE WAS PARKED IN DRIVEWAY AT NIGHT. DURING THE NIGHT, VEHICLE ROLLED OUT DRIVEWAY, ACROSS STREET AND INTO NEIGHBOR'S YARD. VEHICLE WAS PARKED, SHUTOFF AND KEY REMOVED EVEN THOUGH NOT PUT INTO PARK. I TRIED IT AGAIN AND KEY CAN BE REMOVED AFTER TURNING OFF ENGINE WITH AUTOMATIC TRANSMISSION SHIFTER STILL IN "D".