Hi Boyd,
Thanks for noting that! I'm not sure if I'll be able to see the show here, but it sounds incredible! :)
I've linked below to an expired patent (from 1982) for a simple hovercraft toy, which the patent says could also be made into a full-sized vehicle!
(To see the full patent, click on the link below then click on "View Images".....)
Actually, this one looks even simpler to make than the one I remember seeing as a kid in that book from "Popular Mechanics".... :)
- Dien
Hovercraft toy....