A Reddit user, Ocardona208 posted this quick shot of an old-school Cadillac limo converted to a really stern-looking double rear wheelie which he spotted in transit on a US highway. Maybe he had wanted to please car enthusiasts, who knows!
From the looks, it is obvious the body of the car was stretched to allow for extra doors on both sides of the vehicle.
Additionally, a raised suspension is very visible with extended rear fenders. It's most likely fuel consumption would increase with additional drag except perhaps the engine was tuned up to conveniently carry such mass.