If above is above and below is below then what is above will drop down and it will increase in speed according to the acceleration-speed. On a flat plane gravity doesn't exist unless it means the acceleration-speed. On a globe we revolve at an incredible speed but the gravity on the equator and poles is the same.. So if we wouldn't get crushed at the poles then we would fly away at the equator. We revolve at a speed at around 1000 miles or 1600 km per hour at the equator but at the poles at 0 km per hour. Many things in this short text doesn't add up and would suggest a flat non-motioning plane.