kach22i -- When the white pickup passes it's just like the ending of the movie Vanishing Point.
I think the half-tonneau question is explained by this, the augmented coanda nozzle:
The cavity is about as long as it is tall, and contains a bubble of air about the size of a hay bale that is spinning. If the bottom was half-rounded instead of filled with batteries or whatever it would be optimized.
Edit: Xist -- Possibly Twerks=T-100. Compound curved?