Neat!
I find watching feet on a board skittering over choppy water mesmerising.
I love watching everything move to maintain perfect balance on something so fluid and unpredictably mobile.
The fact that it can be done for even a short period is amazing, let alone that it can be done for hours on end.
It's a tribute to human perseverance that such things can be thought of, experimented with and then worked on and perfected to the point that it all works so well.
I love it.