THIS is a really, really want ......
 

https://www.jetdrift.com/sea-doo-spark-evojet/

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had a hard time getting past the first 30 seconds when the
junior high-school dropout was speaking, ya no whut I mean bro?
but the spastic hand gestures helped out a lot.

Strange that he talks about all the great features like reverse,
a bilge pump, etc as if they are really neat features on the modified
machine but doesn't mention those are stock features and came
from the factory on the sea doo.

So basically, it's a stock sea doo that is modified (aftermarket)
to sit in instead of on.
That would lower the center of gravity and change the
ergonomics and feel, but not much else.
Oh and they also changed a two-seater into a one-seater. Good idea :rolleyes:
If they want to do a meaningful test, they should compare the
stock sea doo with the modified one on a controlled close course.
I doubt there would be much difference.

I'd like to try it and sure it would be fun.
But would I like it more than the stock machine?
After the novelty wore off, probably not.