Today I saw an ultra-cool water sports "toy" designed by a German designer Mathias Koehler. It can be pulled by a kite, steered by feet, with a rotating handle, and can also control the "airfoil" to achieve diving. Wow, if the wind is strong enough, it must be super fun to play with. One question is, how to make this thing stop... Wait for the wind to stop? Cut the kite string? Rush to the shore? Click to see more cool pictures!