Amazing footage shot of some highly skilled wakeboarders, entitled "Winch Madness".
According to Wikipedia, Wakeskate winching involves "an engine, spool, rope, handle, frame, and some sort of simple transmission. The person being towed walks (or swims) away from the winch and pulls out all of the rope." When the winch lets loose, the boarder can go 15-25 mph.
Shot with the RED ONE camera.