don't go all FE on me now
gravity isn't just falling down when you get lifted upwards away from teh ground. it also is why driving really fast and hitting something is so lethal - because of the mass. what hurts is caused by the mass, this is one of the parts of gravity that non-physicists don't understand.
the thing that causes inertia is related to the thing that makes objects move towards each other in space. it's my personal hypothesis that it's a surface tension effect, and that all matter has an invisible cloud of electrons in long orbits (like how comets are in long orbits, and the perseid and taurid and leonid meteor swarms). the clouds of two bodies of matter when they come into contact try to optimize their surface like how two drops merge into one, at first it's a barbell shape, and then the shared surface pulls everything in the middle of it together to become a sphere, which is the optimum shape for resisting ...
the resistance that gravity creates is against space itself, which is also a form of matter, that has no elasticity and is constantly increasing in every direction. the surface tension effect is created by this constant pressure trying to push matter apart, and those clouds of electrons are part of the mechanism that pushes matter back together at the same rate, thus retaining the geometric relation between all the particles in bodies of matter.
i'm actually not a fission, fusion or antimatter fan. i think that all energy comes from that expansion of space, and with the right device, you can redirect that energy to create a "bubble" of space around you that behaves in the same exact way as a single "particle" of space. thus it has no mass, it is inelastic, and it cannot be involved in a collision because it has no mass, and it has no limitation of light speed, because it has no mass (if m == 0, then the energy also becomes zero).
that's my theory anyhow. i've been ruminating on this one since i created these images
https://www.flickr.com/photos/47065683@N00/77738769/in/photostream/
there is others in that set, but this one is the prettiest and this shows the nucleus of a gravitational mass center, and the way that matter directs the expansion force through channels fanning outwards in every direction, via the mechanism of those quantum nullified electrons in the long orbits
so yeah, i also think that creating that gravity effect involves electricity. i've got a theory that it can be built using a modified tesla coil with a resonant cavity coated with diamagnetic material, that tunes the output of the tesla coil to convert normal electrons into these "mass" electrons. but that's as far as i have got with designing an experiment. it's inspired by the Emdrive, which normally uses microwaves and a resonator but this uses tesla waves (which are higher energy configurations of electrons much shorter wavelength than microwaves, think femtometres).