I HAVE A 2015 JEEP GRAND CHEROKEE WITH A MONOSTABLE GEAR SHIFTER. NUMEROUS TIMES I HAVE HAD THE CAR GO INTO AN UNDESIRED GEAR. ON OCTOBER 20, 2015, I DROVE THE CAR INTO THE GARAGE TO PARK IT; I PLACED IT IN WHAT I THOUGHT TO BE PARK, EXITED THE VEHICLE, AND THEN THE VEHICLE (IN REVERSE) STARTED TO DRIVE OUT OF THE GARAGE. I WAS CAUGHT BETWEEN THE DOOR AND CAR AND UNABLE TO GET BACK IN DUE TO THE SPEED OF MOVEMENT. AS THE CAR BACKED OUT, THE DOOR CAUGHT ON THE MAIN SUPPORT COLUMN TO THE HOUSE AND BENT BACKWARDS; EVENTUALLY THE DOOR HINGE GAVE OUT AND THE CAR CLEARED THE GARAGE. ONCE IN THE DRIVEWAY AND WITH THE DOOR OUT OF THE WAY, I WAS ABLE TO RUN FAST ENOUGH TO GET INTO THE CAR AND STOP IT BEFORE IT DROVE INTO THE HOUSE ACROSS THE STREET. THE CAR HAD ENOUGH SPEED TO SCREECH WHEN THE BRAKES WERE APPLIED. MY SHOULDER AND ARM WERE BADLY BRUISED BUT I DID NOT SEEK MEDICAL ATTENTION. THE HOUSE DAMAGE WAS MOSTLY MINOR; WE ARE AWAITING AN INSPECTION TO VERIFY THE COLUMN'S INTEGRITY. THE CAR DAMAGE WAS SUBSTANTIAL, REQUIRING A NEW DOOR AND TWO NEW PANELS. MY INSURANCE COMPANY, USAA, COVERED THE DAMAGE (MINUS DEDUCTIBLE). MY BROTHER HAD A SIMILAR EXPERIENCE IN A CHRYSLER 300 WITH THE SAME SHIFTER, HE BACKED INTO ANOTHER CAR WHEN HE THOUGHT THE VEHICLE WAS IN PARK. MY WIFE HAS MADE THE MISTAKE ON OUR JEEP A NUMBER OF TIMES AS WELL, BUT SHE HAD NOT GOTTEN OUT OF THE VEHICLE COMPLETELY BEFORE NOTICING THE ERROR.