Incident 8/22/2022 where driver put vehicle in park, turned car off, as exiting, vehicle rolled backwards. Driver fell to ground sustaining injuries, vehicle stopped moving after approx. 5 ft. When driver looked at shifter after standing back up, the gear was in Drive. Driver saw ER for medical attention. Chevrolet GM has been notified via telephone. Service appt to evaluate vehicle has been scheduled with a GM service dept.