@The Anointed,
The Flat Earth crowd insists gravity does not really exist, and suprisingly, they make a good case for it.
They assert that rather than gravity, we have layers of buoyancy, and that heavier objects sink while lighter objects float. That is, if gravity were a REAL force, it would be sufficient that objects could not overcome it, but instead, birds fly, as do... SOLID CHUNKS OF METAL WITH UP TO 500 PEOPLE FOR A JUMBO JET. Sorry, you expect me to believe this is still a real force after that? This is more about having a large ship with mostly empty air than it is about overcoming gravity. Buoyancy. Birds aren't flying, they are literally "swimming" in air because they have lightweight bones and feathers. Likewise with gliding, you are matching the pressure of air.
Our atmosphere is layers of moist pressure. After the water level, it switches from mostly water (non-breathable) to mostly moist air (breathable), and you see this pressure system all the way from top to bottom. Creatures like crabs tend to sink (but we don't call this gravity, but lack of buoyancy, they are heavier than the water pressure of all but the deepest water), while most fish manage to float. We humans can swim but not fly. Oddly, there are some birds that can fly but not swim (and vice versa, I believe this can be explained by their body's ability to retain or expel moisture; a duck can swim because its high body fat slicks off moisture, while animals that suck it up like a sponge add water weight to their body, in much the same way obese humans can float).
Basically, there is no spinning Earth generating gravity, in fact there is no gravity at all, since large airships (plane is an inaccurate term, since what it is is a ship, not a flat object) can ride above supposed gravity. Underground on land, the same thing is the case, "gravity" (notice we don't call this buoyancy without water) is most intense at the Earth's core. Yes, when I say flat Earth, I do not mean there is nothing underground/underwater but that the surface of the earth is a disc.
Biblically this is supported. "'Let there be a dome in the middle of the water, let it divide water from water.' God made the dome and divided water under the dome from water above the dome. And God called the dome sky." In other words, we have sphere that is divided into two domes, air and water. This is more or less exactly what we see with our atmosphere and our... hydrosphere? Our underwater pressure system. Then earth and lava is added into the mix.
https://www.weather.gov/jetstream/layers_ocean
https://www.nasa.gov/mission_pages/sunearth/science/atmosphere-layers2.html