I rewatched the scene at the beginning where Tom in the truck rams the police car blocking the road. I see the police car getting rammed and spinning around and I see the piece of chain in the back (attached to the bumper?) but I don’t see any casters. The car has regular wheels from what I see. Also what was that chain supposed to do? Was it attached to something? I don’t see the car being chained to anything. Was that chain supposed to stop the car from spinning and rolling away? Lol. I don’t see how that little chain would make any difference.