It’s not a car. For a start, a car would have destroyed the set and yet the windows are still intact at the end of the shot. Whatever it is has been superimposed after the scene was filmed. The object, along with an animated flash ( you can see the hand painted element around the officers hands in the first 2 pictures), has been slowed down by duplicating frames. Yet there are no duplicated frames with the on set footage, so this has to have been added after. And the object that people think are the car wheels, well that plays out at a normal framerate so is not part of that larger object.
