So, at what point do you go from a viewing where there's 'nothing strange happening here', to 'that's possible' to 'that's odd' to 'that's really weird and highly improbable' to ultimately 'that's impossible'. … Reverse the film – so the car is now moving backwards. Well, it's odd but cars can move in reverse. Resume normal filming. The car is actually being driven by a drunk driver and he hits a pedestrian killing same before crashing and totally … …

Excerpt from:
Atlas Motor Pasta | Eli's Book Library