it's called sprint boat racing and it originated in the land down under AUSSIE!!! haha you can actually pay and get a ride at some of the tracks. Tracks are man made and only 3-4 feet deep. 0-70mph in around 2 seconds. it's so fast
They are sweet....but It would suck when they flip on their lid and your in the water waiting for someone to flip you back over, lol
that would suck but they typically always flip onto the grass somewhere. look at some crash vids on youtube, its pretty safe looking for the most part