WHILE AT HOME DEPOT I REMOTE STARTED MY TRUCK AND PLACED LUMBER IN THE BED. I PROCEEDED TO THE DRIVER'S DOOR AND WHEN I OPENED THE DOOR THE TRUCK WENT IN REVERSE KNOCKING ME TO THE GROUND CAUSING A LACERATION REQUIRING 8 STAPLES, CONCUSSION, LOWER BACK AND SHOULDER PAIN AND BRUISING. THE TRUCK CONTINUED ACROSS THE PARKING LOT HITTING A FORD RANGER CAUSING MAJOR DAMAGE, CONTINUING INTO ANOTHER VEHICLE GMC CM3500 CAUSING MINOR DAMAGE. MY LARAMIE SUFFERED MAJOR DAMAGE TO REAR BUMPER, TAILGATE, AND REAR DRIVER SIDE PANEL. WE ARE JUST LUCKY THERE WERE NO OTHERS WALKING IN THE AREA AT THE TIME. MY 2015 LARAMIE HAS A ROTARY SHIFTER AND IT WAS IN PARKED POSITION AT THE TIME OF THE INCIDENT. I FEEL THERE IS A DEFECT IN THE ROTARY SHIFTER WHICH CASED THIS ACCIDENT TO HAPPEN.