Cloudscape

Walking on walls, falling from high heights without damage, flight without propulsion - it could be possible with magtech.

(Written from the perspective of the future)

Magtech is a branch of technology which made use of magnetic fields generated in our bodies. Our every cells are filled with nanorobots, and these can each create a magnetic field, so that so could our bodies themselves. If these magnetic fields are made strong enough, this can be used to repel or attract our bodies. This can be very useful, for instance to create artificial gravity, so that we can walk on magnetically charged walls, or on the contrary counter gravity, so that we can safely fall on a magnetically charged ground.
The important thing is that there is a gradient in the magnetic field generated by the foglets. Because electromagnetism is so much more dependent on distance than gravity, if the body's magnetic field were homogenous, the magnetic force it would experience would not be. So, if magnetic attraction was to be used as artificial gravity, the magnetic force has to be stronger at the head than at the toe.
Although this was first applied in spaceflight, today we use it in our daily lives. For instance, we can now actually walk on the walls of buildings - something now seen ordinary, but the mere idea of which would once have seemed surreal. In this way, the walls of buildings have also become walkways - walkways, as it were, to the sky.
Magtech can also be used to cause a magnetic object to fly: because nanorobots are spread throughout the atmosphere, and each of them can generate a magnetic field, they can do this to attract (or repel) another magnetically charged object or person as it comes close.