I WAS IN LOS ANGELES PICKING UP MY TWO FRIENDS ON WHITLEY AVENUE, THIS STREET IS ON A BIT OF AN INCLINE. I WAS DRIVING MY TOYOTA PRIUS AND PRESSED THE "PARK" BUTTON. INSTEAD OF PARKING, THE CAR STARTED TO ROLL BACKWARDS AND WENT INTO NEUTRAL. THE GEAR SHIRT IS SEPARATE FROM THE PARK BUTTON SO I KNOW FOR A FACT THAT I DID NOT PUT THE CAR IN NEUTRAL. I ATTEMPTED TO PRESS THE POWER BUTTON ON "PARK" BUTTON ON THE CAR. I EVEN TRIED TO CHAGE THE GEAR SHIFT TO "D" (FOR DRIVE) REPEATEDLY. NOTHING I TRIED AT THE TIME WAS WORKING AND WHITLEY AVENUE INTERSECTS A VERY HEAVY TRAFFIC STREET, FRANKLIN AVENUE SO I NEEDED TO STOP THE CAR BEFORE IT WENT INTO THIS STREET. I TURNED MY WHEEL TO HIT MY CARE AGAINST CURB SO THAT IT WOULD STOP ROLLING. THIS RESULTED IN MY CAR CAUSING A DOMINO EFFECT AND HITTING A SECOND CAR, WHICH HIT ANOTHER CAR, WHICH HIT ANOTHER CAR. IN TOTAL MY CAR AND THREE OTHER CARS WERE AFFECTED BY THIS IMPACT. MY TRUNK COMPLETELY SHATTERED AND THE STUFF FROM IT FLEW INTO THE CAR THAT I HIT DIRECTLY HIT (THIS TRUNK ALSO COMPLETELY SHATTERED). THE TRUNK OF THE THIRD CAR ALSO COMPLETELY SHATTERED. MY CAR IS NOW TOTALED AND I WOULD LIKE TO FIND OUT WHAT HAPPENED. AFTER THE ACCIDENT I WAS SPEAKING WITH PEOPLE IN THE AREA AND ANOTHER LADY INFORMED ME THAT SHE HAD SEEN ANOTHER PRIUS ROLL UNCONTROLLABLY DOWN THAT HILL AS WELL.