Car was in FSD mode, backing out of a parking place very slowly when it accelerated and crashed into a post and wall. No other cars or people were involved, but no alarms, beeps, or warnings were sounded and the screen/monitor/camera systems went blank simultaneously. This caused over $5000 worth of damage per the estimate provided by the only body shop in the area allowed to fix Teslas. There is also a gap in saved data per our retrieval from the USB and camera installed in the vehicle.