Sceptimatic,
Your grasp of physics is clearly very limited.
You claim that the force that us "round-earthers" like to call gravity is in fact an illusion caused by air pressure.
In that case, may I ask, what prevents us from floating into the air when we jump up?
Your explanation of how air pressure functions as a gravity replacement is sorely lacking in several areas:
1. Air pressure acts in all directions equally. (think about blowing a balloon up). If air pressure acted in mainly the downwards direction, a balloon would change shape if you turned it. If this is true, then why do we fall back down if we jump, exposing the soles of our feet to the air pressure and equalising the forces?
Also Scepti, why don't you try and carry out experiments to prove your ideas. If gravity is caused by air pressure, then shouldn't logically in a near vacuum things should accelerate much slower. Do you agree with this?
Why should anything accelerate slower in an partially evacuated environment?
It's the total opposite. Less resistance means faster acceleration. Oh and I know you will then say, "yes, gravity"...No, it's not, but you are hell bent on the word, so nothing else will suffice.
2. If pressure is the only force acting on an object at rest, then in an environment free of air (i.e. a vacuum) then an object released in a vacuum should surely stay suspended in the air, or at least fall at a greatly diminished speed as there are fewer particles colliding with it to push it. (check your year 11 chemistry for more details of the kinetic gas model).
3. If gravity does not exist, then how can phenomena such as the Eötvös effect (see dedicated thread), gravitational bending of light by the sun
http://phys.org/news162820004.html and the G measuring apparatus
http://tikalon.com/blog/blog.php?article=big_G function?