if you notice in all of Blains shows, the people stand behind him at an angle, as has been said before.

I have done it several times, and I assure you, as an overweight female, I have NO special powers. It is merely an optical illusion, and a very good one at that!

It has pretty much been explained. If you find someone who can do it and is willing to show you from all angles, then you will understand.

Some of Blains levitations are done using camera tricks and wires, though. With those levitations, he can rise up to a foot off the ground. The other trick only gives you 4-6 inches.