Some race snowmobiles, some race lawnmowers, some race pickups, some strap little pieces of fiberglass to their feet and race down frozen water...  Some,, ever race cars around in a circle !!

Does look interesting, 700-1000 h.p jet pump and 16-18 foot boat= rocket fast! 

Just different idea's for fun that people have.

Lordy,, some people take sticks and knock little white balls around a lawn and call it fun...