Fuel good factor
Man, this guy is weird, but to me it looks as if he's trying out some kind of aerodynamic refinement. Specifically, it appears that he is trying to minimise drag, or wind resistance, which is actually a big factor in fuel consumption.
By covering up the rear wheels, he's obviously trying to smoothen the airflow over that part of the car's body. The bumps all over the upper surface of the car look like they are there to break up the airflow and slow down the air passing over it in order to raise the air pressure in those areas. There's usually a low pressure zone above and behind a moving car, which causes quite a bit of drag.
The bumps could be there to serve the same function as the dimples on a golf ball; those are there to disrupt the airflow around the ball as it flies through the air, preventing an area of low pressure from building up behind it and allowing it to travel further.
It looks a bit extreme, but I'd be curious to know the results of this experiment on his fuel consumption. At a steady 100km/h, two-thirds of fuel is consumed to overcome wind resistance, so these add-ons could be more effective than they look!
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