I guess I'm way off topic on the blog today, but I thought this was cool. I'd heard about this a few years ago, but of course it's quite apropos to be reminded of it now. I present to you, Michael Jackson's patent. Yes, the Michael Jackson. It is for the special shoe that enabled the "Smooth Criminal" effect in his stage shows.
On the subject of "anti-gravity" illusions, you owe it to yourself to learn how to do Balducci levitation. It's an absurdly easy party trick that makes it appear as if you are levitating a couple inches off the ground. I'm terrible at selling magic tricks, but even so, I've gotten people to say, "Oh my god, how did you do that?" and I only practiced for like 15 minutes.