C'mon, Pee... if the Philly experiment was an actuality, it wouldn't have mattered where on the planet it occurred... in water, or not... cause Earth is constantly spinning in 'space/time'... relatively, we're never where we were... even an instant before. ;)
As far as the topic goes, ever since I was a little tike, and had a balloon rubbed on my head by my friend's older brother, and it (the balloon - not my head) was then stuck on the ceiling, where it took some doing for my retrieval of it, I've believed that gravity is simply another, 'weaker' form of electrostatic force. No such thing as gravity... or 'anti-gravity', for that matter.
The attracting/repelling forces of this 'weaker' state of 'static electricity' are what, I believe, has the scientific community befuddled into simply labeling it 'gravity and antigravity'.
By 'weaker', I mean 'without the stronger property of regular static electricity' - sparks!
This static discharge, in the form of the release of energy from a mass, is inversely proportioned to its mass in this 'weakened' force.
Imagine the Earth and its atmosphere spinning against the 'fabric of space'... a lot of forces being generated by this interaction. However, because the mass of the planet is so great, the 'discharge energy' has been supplanted by a greater attractive force and a diminished repelling force. This remaining effect is what is commonly called 'gravity'.
Isn't that right, Bags? ;)