ON 11/4/14 AFTER PARKING MY NEW JEEP GRAND CHEROKEE AT GROCERY STORE PARKING LOT, ON A COMPLETELY LEVEL SURFACE, AFTER PLACING VEHICLE IN PARK, EXITING AND WALKING TOWARD STORE ENTRANCE I SAW MY CAR COMING AT ME OUT OF CORNER OF MY EYE. THE CAR HAD "POPPED" OUT OF PARK AND INTO NEUTRAL, AND WAS ROLLING BACKWARDS TOWARD ME. I WAS WAITING FOR ANOTHER VEHICLE TO PASS BY IN THE PARKING LOT ON MY WAY INTO THE STORE WHEN THIS OCCURRED. MY JEEP KEPT ROLLING SLOWLY BACKWARDS TOWARDS ME. IT COLLIDED INTO A CAR PASSING THROUGH THE PARKING LOT. THE OTHER CAR HAD 3 CHILDREN IN CAR SEATS IN THE BACK SEAT. LUCKILY NO ONE WAS INJURED, BUT I WAS MORTIFIED AT THE LOOKS ON THOSE CHILDREN'S FACES, THEY WERE VERY SCARED! I HAVE BEEN DRIVING MANY YEARS & THIS WAS NOT DRIVER ERROR. MY HUSBAND AND I TRIED NUMEROUS TIMES TO RECREATE THE SCENARIO WITHOUT SUCCESS. THE WARNING ALARM SIGNAL WOULD COME ON IF THE CAR WERE NOT IN PARK AND YOU TRIED TO EXIT IT, SO I KNOW THAT IT HAD BEEN COMPLETELY IN PARK AND HAD "POPPED OUT" AFTER I EXITED. I IMMEDIATELY TOOK THE CAR TO THE DEALER AT VALENCIA, CALIFORNIA SUPERSTORES CHRYSLER JEEP AND TOLD THEM OF THE INCIDENT. THEY CHECKED THE CAR AND SAID THERE WAS NOTHING WRONG WITH IT. THEY HAD IT FOR SEVERAL DAYS AND WERE UNABLE TO DETERMINE THE PROBLEM WITH IT POPPING OUT OF GEAR AND CHRYSLER CORPORATE SAID THEY HADN'T HAD COMPLAINTS. THEY TOLD ME THERE WAS NOTHING WRONG WITH IT AND TO PICK IT UP. IT IS A DEFECTIVE DEATH TRAP AND I DID NOT FEEL SAFE DRI