I PARKED ON MY DRIVEWAY, WHICH SLOPES UPWARD. I PUSHED OPEN THE DOOR TO THE MAXIMUM EXTENT. AS I EXITED THE CAR, THE DOOR CLOSED BY ITSELF, HITTING ME ON THE SHOULDER AND INJURING THE SHOULDER. (I AM NOW GETTING MEDICAL TREATMENT FOR THE INJURY.) BOTH THE FRONT DRIVER AND FRONT PASSENGER DOORS FREQUENTLY CLOSE ON THEIR OWN, BUT THIS WAS THE FIRST TIME I WAS SERIOUSLY INJURED. AFTER MY INJURY, I ASKED FRIENDS IF THEIR DOORS DID THIS, AND TESTED THEIR DOORS. EVEN PARKED ON A VERY SLIGHT UPWARD SLOPE, MY DOOR HAS A TENDENCY TO CLOSE ON ITS OWN. AT THAT POINT I REALIZED THERE WAS A PROBLEM WITH MY CAR; THE DOOR WAS NOT SUPPOSED TO CLOSE LIKE THIS. I PLAN TO TAKE THE CAR TO THE DEALER AS SOON AS I CAN TO SEE IF THE DOOR MECHANISM CAN BE FIXED ON BOTH SIDES.