When I was younger, I dated a girl whose parents owned a fancy speedboat (well, it was fancy to me at least). Several times a year we would all go out to the lake and ride around. My favorite part was riding in an inner tube behind the boat, as it was a challenge to stay on top of it. A few times I tried using their skis, but that always ended very quickly with me face down in the water. Perhaps I’d have had better luck with this Waterskiing Chair.
Your eyes aren’t playing tricks on you. That would be a pair of skis with a seat between them. It’s more than that though, as it has a pivoting steering system that allows you to change directions simply by leaning one direction or the other. The two foot holds will help you stay anchored to the chair as you hit wave after wave. The $500 price tag seems really steep for something like this though. If you don’t mind spending that kind of money, then maybe you should just go all-out and get this tow boat while you’re at it.