I PARKED MY 2005 FORD EXPLORER 'EDDIE BAUER' AT THE FLAT TOP OF A DRIVEWAY AT 115 HOPKINS LANE IN BECKET, MA 01223. I PUT THE VEHICLE INTO 'P' AND EASILY REMOVED THE KEY WHICH I STASHED IN THE CUP HOLDER AS ALWAYS. THE DRIVE OF THE CAR PARKED BEHIND ME WAS STANDING ABOUT 20 FEET TO MIGHT RIGHT AND AS I WAS WALKING BEHIND MY VEHICLE SHE YELLED 'MOVE! YOUR CAR IS ROLLING!'. I WAS LUCKY ENOUGH TO GET OUT OF THE WAY AS THE FORD ROLLED VERY SLOWLY BACK ABOUT 6 FEET AND THE TRAILER HITCH CRUSHED THE REAR BUMPER OF HER 1999 PORSCHE 'BOXSTER'. LUCKILY NOBODY WAS HURT. THERE WAS NO DAMAGE TO MY VEHICLE. THE DAMAGE TO THE PORSCHE WILL BE $1,400 + . HAD THE FORD MECHANISM BEEN WORKING CORRECTLY I WOULD NOT HAVE BEEN ABLE TO EXTRICATE MY KEY. *TR