The Hydrofoil Water Scooter

This is a cool machine! It's not quite a boat and not quite a scooter:

Unlike other watercraft, this unique hydrofoil frame allows you to skim across water simply by hopping gently up and down, propelling you as fast as 17 mph (more than four times faster than some world champion freestyle swimming
speeds).

Make sure you click on the Quicktime video clip to see the motor-less scooter in action. It's pretty cool!