Here's the part with the wheeled device that RedDevil proposed. It does exactly what he says.
EDIT: shoot, the forum doesn't seem to want to post time-stamped links correctly.
Anyway, it's at 13min 15sec, or just add "&t=825s" onto the end of the URL in your browser.
Derek won his bet. You can pause his video to see the equations. You can also see some of the earlier runs with more-complete instrumentation.
Watch through it with an open mind, aerohead. It's not a perpetual-motion device, it merely finds a neat way to take advantage of a body moving while in contact with two media that are moving at different velocities. Much like a modern sailboat does.
-soD