We thought about this when we ran across the viral photo of an EV with a generator connected to the back wheel ... Most perpetual machines try to use force from magnets. Gravity is also a popular ...

In this case, I mean the many videos dedicated to free energy, overunity devices, perpetual motion machines ... much power they create their own anti-gravity field and fly off into space.

This is the trouble with the seekers after perpetual motion ... of power from the effect of gravity. Other inventors have sought to utilize the properties of a magnet for the same purpose.