Wait - you have to be ambulatory to ride that?
Someone call the ADA. That's some BS right there.
I don't know what exactly would qualify as an ADA violation. But "ability to walk unassisted" only applies to "small children". What it says exactly is:
"Guests must be at least 42” or accompanied by a supervising companion (14 years or older). Small children must demonstrate the ability to walk unassisted."
Submarine Quest | SeaWorld Rides