As I was slowly backing into a supercharging parking space watching the rear view video on the car's LCD screen, unbeknownst to me the image from the rear view camera froze. To me it appeared that the car had stopped moving so I applied a little more juice and promptly ran into the protective bollard at the back of the parking space, at which point the rear view camera started working again. If there had been someone behind me, I would have hit them. As it was, I only damaged the car's rear hatch. I tried backing up again and had the image freeze again. I then re-booted the car's system and the problem was not experienced again on that trip. Since then I have had the problem occur one other time and re-booting the system again seemed to fix it. The problem appears to be due to a failure in the car's software as it relates to the rear view camera. I have not taken the car to a dealer yet to see if they can fix the problem and the car has not been inspected by another party. There were no warnings or messages when the problem occurred.