MY CAR WAS PARKED IN OUR GARAGE WHICH IS LEVEL. MY SON AND I GOT INTO THE CAR, AND I ATTEMPTED TO PUT THE CAR IN REVERSE TO LEAVE. AFTER SEVERAL ATTEMPTS, THE CAR WOULD NOT GO INTO GEAR. WITH THE CAR STILL PARKED IN THE GARAGE AND WITH THE ENGINE OFF, MY SON AND I EXITED THE CAR, AND I WENT INSIDE THE HOUSE TO GET THE KEYS TO ANOTHER CAR. ABOUT 10 MINUTES LATER WHEN MY SON AND I WERE IN THE OTHER CAR (PARKED ON THE STREET) GETTING READY TO LEAVE, WE SAW MY CAR, WITH NO ONE IN THE CAR, EXIT THE GARAGE AND GO DOWN MY DRIVEWAY AND INTO THE PLANTS AND ROCKS IN MY FRONT YARD.