bngenoh
The Living Force
The Video with the girl in purple is definitely just a cheap trick, there are multiple videos on youtube on how to do it. The trick lies in the feet, and the angle that you the "levitator" are being filmed, you use the foot that is hidden from the camera to push up your whole body and balance yourself. Make sure to angle the foot that is in the air in such a way that it conceals the supporting foot that is on the ground.
http://www.youtube.com/watch?v=M0n86DfHLSM&feature=related
http://www.youtube.com/watch?v=M0n86DfHLSM&feature=related