What would an auto race with no vehicle restrictions look like?

Imagine the chaos, the thrill, the absolute bonkers beauty of an auto race with no vehicle restrictions! It'd be like a wild, automotive jamboree, where a sleek Ferrari could face-off against a rocket-powered go-kart or even a monster truck with jet engines strapped on. The variety would be a sight to behold, with Mad Max-like contraptions zipping around next to eco-friendly solar cars. The unpredictability would be as high as my caffeine levels on Monday mornings. Quite frankly, it'd be the most thrilling, utterly unpredictable, and fantastically fun spectacle this side of a clown convention!