According to Russian Traffic Code a driver of a vehicle is responsible for compensation of damages to a pedestrian, even without fault. To prove your innocence in these cases is very hard.
This law was a reaction to multiple deaths of pedestrians every year inflicted by drunk or reckless drivers. However almost any law can be exploited.
Check a short report on it here, on LiveLeak.
Most of the fake incidents are innitated by people throwing themselves under a car like this :