ON 09/07/2017, I WAS BACKING UP MY VEHICLE IN A TIGHT SPOT AT MY CONDO PARKING GARAGE. I PULLED FORWARD AND SHIFTED THE ELECTRONIC GEAR SELECTOR TO "PARK" SO I COULD GET OUT OF THE VEHICLE AND CHECK THE CLEARANCE. WHEN I WAS HALF WAY OUT THE VEHICLE IT STARTED BACKING UP BUT FORTUNATELY I WAS ABLE TO JUMP BACK IN WITHOUT PHYSICAL INJURY. THE VEHICLE HOWEVER SUSTAINED $2000 TO $3000 ESTIMATED DAMAGE TO THE REAR END WHEN IT SLAMMED INTO A LARGE WATER PIPE IN THE GARAGE. ABOUT A WEEK LATER I WAS CHECKING THE SHIFT SELECTOR TO SEE IF I COULD DUPLICATE THE PROBLEM. IT WOULD NOT DUPLICATE THE EXACT SAME PROBLEM BUT ONCE WHEN I TRIED TO SHIFT IT TO "PARK" IT WENT INTO REVERSE" BUT WOULD NOT MOVE WHEN YOU TOOK YOUR FOOT OFF THE BRAKE PEDAL EVEN WHEN I PRESSED THE GAS PEDAL. UNFORTUNATELY I DID NOT HAVE MY PHONE WITH ME TO VIDEO THE INCIDENT. I HAVE TAKEN THE VEHICLE TO MY LOCAL DEALER AND THEY SAID THEY THEY COULD FIND NO "CODES" OR PROBLEMS AT THIS TIME. I AM TAKING IT INTO A BODY SHOP FOR REPAIR NEXT WEEK AND WILL KNOW THE EXACT DAMAGE AND COST. I WILL ALSO TRY TO DUPLICATE THE PROBLEM AGAIN AND I DEFINITELY WILL HAVE VIDEO CAPABILITY AT THAT TIME.