I've been looking at things like the IIHS crash testing videos and noticing that the way they get the car to move without actually running the car is they have a pulley that pulls the car about 40mph. Could this be implemented in the game? It would be kinda like a winch except low profile and the hook would detach when the car hits something or vice versa. Here is a rough sketch: Basically, a variable speed, low profile, strong, speedy winch that detaches from the car when something hits the car or the car hits something.