I PULLED INTO A PARKING SPACE AND SHUT OFF THE ENGINE WITH MY PUSH BUTTON START, WITHOUT PUTTING THE SHIFTER INTO THE PARK POSITION. THE VEHICLE ALLOWED ME TO EXIT AND THE CAR STARTED ROLLING BACKWARDS. I TRIED TO RE-ENTER THE VEHICLE TO ENGAGE THE BRAKE AND WAS KNOCKED ONTO THE PAVEMENT BY THE DRIVER DOOR. I WAS FORCED BETWEEN THE BOTTOM OF THE DOOR AND THE PAVEMENT AS THE VEHICLE ROLLED PAST ME AND ENTERED TRAFFIC, CROSSED TO LANES AND WAS STOPPED BY A CURB AND A SPEED LIMIT SIGN. VEHICLE BUMPER WAS DENTED. I SUFFERED SEVERAL BRUISES, A SPRAIN, A LARGE ABRASION, AND PULLED BACK MUSCLES. WENT TO THE ER AND MISSED A COUPLE DAYS OF WORK. INJURIES DO NOT APPEAR TO BE SERIOUS AT THIS TIME. *TR