Ok first, let's state the obvious...
1) it's a boat ride.
2) boat rides are "mostly" surrounded by water..
3) removal of person in wheelchair in a boat surrounded by water is a very hard thing to do.
before i go further let me state i am a handicapped person who sometimes must rely on mobility equipment. so i can be biased

as a disabled person I have come to the realization that I won't be able to do things most people do (i can eat pixie stix a diabetic can't.. see it all balances out), and when i get on any ride or attraction, I also realize it's on me and i'm responsible for my own health.. I know what i'm capable and not capable of doing. this guy decided to get in a boat ride with a wheelchair.. I did it too, but I had the common sense to think "ok, chances are if something goes arye, it's going to be a piff to get me off, i'll have to suck it up and wait"
people like this gentleman disgust me, they are using their disability in a tainted manner that makes others like myself look to feel entitled and needy.
I hope he doesn't get 1 red cent.