This is a video demonstration of the $500 Fanimation Air Shadow ceiling fan. It's a ceiling fan with blades that remain retracted until it gets up to speed, at which point they spread out to do their thing (move air). It's the perfect fan for a bedroom with two double beds (like mine), that way you can turn it off and you and your lover won't hit your heads on the blades when you're jumping from bed to bed playing booger fingers. "Do I want to know?" No you do not.
Keep going for the video.
Thanks to Gill, who wants a fan with boat paddles for blades in his nautical themed rumpus room.