We can add some liquids in the engine. When the car and the engine crashes, then some liquids flow from specific places...
Maybe not actual liquids but possible particle effects from the radiator? like water squirting out all over the place kinda thing.
Great idea.. But it shouldn't like, keep running liquid out from the engine or w/e, it should like, fall a little out and land on the ground and then stay there. I think that's easier to make, and will prevent lag. (no idea really) But I love the idea!
