all of blaine's tricks were revealed on fox during this one show called "street magic revealed". They said that the leviation is fake...its done by combining footage. When he is in front of a real audience on the street, he will do this lame ass pseudo leviation by turning to one angle and lifting one foot off the ground. If you are at the right angle, you cant see his other foot and it looks like he leviates off of the ground like 1 inch. Then, for the TV audience, they actually take some footage of him levitating using strings in the same location at a later time. Then they combine the footage with the street audience's reactions. Its pretty lame. If you do a search on google for david blaine revelaed, you will find out how to do the pseudo leviation that he does on the street to get the people's reactions.