MY STEPDAUGHTER WAS DRIVING MY VAN AFTER WE WERE RETURNING FROM A TRIP TO CALIFORNIA. WE GOT TO HER HOUSE TO DROP HER OFF WHERE SHE PUT THE VAN IN PARK . I THEN WALKED (BEHIND) FROM THE PASSENGER SIDE TO THE DRIVERS SIDE WHILE SHE WENT TO HER MAIL BOX TO GET HER MAIL. I OPENED THE DRIVER SIDE DOOR, THAT'S WHEN THE VAN STARTED ROLLING BACKWARDS DOWN HER DRIVEWAY. I COULDN'T SEE HER SO I SCREAMED HER NAME SO IT DIDN'T RUN OVER HER, SHE WAS DIRECTLY BEHIND THE VAN LOOKING DOWN AT HER MAIL. SHE GOT OUT OF THE WAY IN TIME TO SEE THAT THE VAN DOOR HAD CAUGHT ME, WAS ABLE TO REACH ME, LUCKILY, TO GRAB AND YANK ME FROM BEHIND IT. THEN WE WATCHED AS IT ROLLED DOWN HER DRIVEWAY INTO THE STREET. LUCKILY WHEN IT HIT THE BOTTOM OF HER DRIVEWAY THE WHEELS TURNED OR IT WOULD HAVE GONE DOWN HER STREET AND CROSSED A SIDE ROAD. THE DOOR CAUGHT A LARGE RECYCLE BIN CAUSING FRONT END DAMAGE AND BENT THE DOOR BACKWARDS ENDING UP WITH THE REAR END HITTING A LARGE SNOW BANK WHERE IT CAME TO REST. THIS WAS A FRIGHTENING INCIDENT, ONE OR BOTH OF US COULD HAVE BEEN KILLED! EVEN WORSE OTHERS COULD HAVE BEEN IF THE VAN HAD GONE INTO THE STREET(S). THE VAN WENT INTO NEUTRAL, I PHYSICALLY SAW IT AND HAD TO SHIFT IT INTO DRIVE TO GET IT OFF THE CURB. SINCE THEN, NUMEROUS TIMES, WHEN I HAVE BEEN BACKING UP OR JUST STARTING TO DRIVE, IT WILL POP INTO NEUTRAL. EACH TIME I HAVE TO PUT IT BACK INTO REVERSE OR DRIVE. THIS IS DANGEROUS!!! WHAT IF IT HAPPENS WHEN I AM DRIVING OUT OF MY DRIVEWAY OR PU