VEHICLE IN PARK AND RUNNING/IDLING ON SLIGHTLY INCLINED DRIVEWAY, FACING UPWARDS. 'DRIVER', OUTSIDE AND BESIDE VEHICLE ON PASSENGER SIDE, OPENED FRONT PASSENGER DOOR TO REACH ACROSS AND REMOVE KEY FROM IGNITION (SHUT OFF THE ENGINE), AND THE SECOND SHE SHUT IT OFF, VEHICLE STARTED ROLLING BACKWARDS, WITH BOTH OF DRIVER'S FEET STILL ON THE DRIVEWAY AND WITH THE PASSENGER DOOR OPEN IMMEDIATELY NEXT TO HER, PULLING HER IN THE DIRECTION OF THE DOWNWARD SLOPE OF THE DRIVEWAY. SHE JUMPED INTO THE CAR, THEN OVER THE MIDDLE CONSOLE, AND WITH HER LEFT FOOT DEPRESSED BRAKE TO STOP VEHICLE. BOTH OF DRIVER'S SHINS WERE SCRAPED BY THE VEHICLE (ALONG THE DOOR SILL), AS IT BEGAN TO ROLL BACKWARDS. FORD MOTOR ISSUED TECHNICAL SERVICE BULLETIN 08-1-8 ON 01/21/08: STOPPED ON INCLINE - IN DRIVE OR REVERSE - WITHOUT BRAKE APPLIED - VEHICLE ROLLS - BUILT BEFORE 11/28/2007. HOWEVER, BUILD DATE FOR THIS VIN IS 01/15/08. ALSO, AND AGAIN, THIS INCIDENT WAS WHILE VEHICLE WAS IN PARK. BRAKE WAS NOT APPLIED. FAILED COMPONENT UNKNOWN.