This made me laugh, so I must post it!

Be patient, after you click on the play button, it might take a minute for the video to load...

Flash player required. Watch Hydrofoil Water Scooter in action.

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). At only 26 lbs., the lightweight aircraft aluminum and fiberglass frame is easy to transport to a dock or boat for launch. Wide steps and handlebars allow confident control as your own hopping motion lifts the hydrofoils to skim quickly across a lake; the aquaskipper also provides a brisk cardiovascular workout. Virtually maintenance-free, it has no moving parts or noisy engines that require fuel.

This can be yours for a mere $499.95!

And think of all the wonderful exercise you'd get!