Rolling on a river

So how about not lifting the user but instead we rotate the platform instead.

[iframe width=”480″ height=”360″ src=”//www.youtube.com/embed/ONjAwKO-IjA” ]

This drastically reduces the power requirements, but again with a platform like this the range of motion isn’t so huge. It’s still only 2 degrees of freedom but it does cover the easiest degrees to fool.