French insurance rules are strict about this: when you're going backward, you are automatically responsible, even if you're not in reality. A friend of mine experienced that while going out of a car place, hitting a car that was running too fast in the parking lot (everybody was Ok to say the smash would have been avoid, at a normal speed). It cost her a lot

(At 3:00: police + hospital without insurance money. Most certainly the opposite of what was expected )