How can David Copperfield fly?

How does david copperfield fly in this video?

• this is the addres of the video media1.yourdailymedia.com/files/9jYX5q…

• Answer:

  My father was a professional stage magician, and I worked as his assistant. I can assure you there is a mechanical trick to this, as there is for every "magic" trick you will ever see. The better the magician, the less likely it will be a simple thing. They are very jealous about revealing their secrets, because their magic acts make them a lot of money. If everyone knew how it is done, it would not be nearly as much fun, nor worth as much money. We pay, partly to try to guess how he did it. Knowing how tricks are done has sort of spoiled it for me. I wouldn't want to spoil it for you too (even if I did know, which I don't).