Do You Think Street Magicians Use Powerful Magnets For Their Levitation Tricks?

It is a high possibility, for me at least. Since we all know objects that are magnetised can be controlled to attract or repel other magnetised or non-magnetised objects, then why can’t street magicians rig the streets to do tricks like levitation?
It is possible to plant a device with controllable magnetic power and have magicians like David Blaine walk up casually and shock passers-by by ‘levitating’ when in fact, there are devices planted in his shoes which are able to interact with the device planted beneath the sidewalk.
So, this device which is similar to a levitation device in a Maglev train can be controlled to be switched on and off and have its power decreased or increased. So, as you can see – all this makes quite a believable magic trick that will surprise most people.
Of course, I am just speculating but don’t you agree the idea is feasible?
=)

How Does He Do It? David Copperfield, The Magician … How Does He “fly” Is It Wires? Magnets? Please Tell!

How does he do it? David Copperfield, the magician … how does he “fly”. Is it wires? Magnets? Please tell!