What do flat Earthers think causes the "magical downward force"?

…and there are probably other ideas out there.

If (1) was the case - the center of gravity of the Earth would have to be so deep down to avoid gravity pointing off at an angle when moving towards the “rim” of the flat earth that the difference in height of a mountain would be negligible and we would get very, very nearly the same gravity everywhere.

2. Gravity does not exist - the Earth is accelerating upwards at 9.8 m/s2 which seems like gravity.

Why do Trump supporters believe Trump should deport the immigrants? These people you call "illegal immigrants" have lived here for many years, they have houses, jobs, how can you think they will just go back to their country, where they have nothing?

They don’t know - and not all of them agree that there is a “magical downward force”.

If (2) was the case - then the acceleration would have to be EXACTLY the same everywhere - and it’s not.

If (3) was the case - you’d have the same problems as (1) - but this weir...

Republican Trump is a billionaire, president, won't be held accountable for multiple felonies, and pretty much has whatever he wants. So why is he always whining and crying about stupid, pointless stuff? Is he incapable of happiness?

3. Gravity doesn’t exist - it’s a form of magnetism that works on non-metals.

1. Gravity is real - but the Earth’s disk is very thick so the force is very nearly vertical.

4. Gravity doesn’t exist - things are held down by air pressure.

Can the belief of not worshipping Christ held by Jehovah's Witnesses be disproven using scripture alone?

I have heard them say:

The trouble with (1), (2) and (3) is that these cannot explain why the force of gravity varies with height above sea level…less at the tops of mountains - more in valleys.