Can pressure create the same effect as gravity? So here's my question: In high gravity environments we'd literally be crushed and extreme water pressure produces the same result. So is it at all possible that we could provide a pressurized environment that creates something similar to Earth's gravity?
 A: No and here's the difference.
In extremely high gravity, we would be flattened against the ground. Our bones could not support our own weight and would break.
In a high pressure environment, we would implode; crushed from all sides. Our bones would be perfectly capable of supporting us and (if there were no gravity to begin with) we could even fly around the room, but the high pressure would act on us like your fist around a Styrofoam ball (there are also numerous other effects that high pressure gases have on your blood vessels, brain, lungs, ears, etc)
What to take home from this? There are many ways to be crushed, but not all of them are the same thing.
A: As james large pointed out in his comment, fluid pressure acts on all sides of a body, and only acts (directly) on the external portions of the body.
As far as simulating gravity goes, it MAY be able to hold you against the ground if you pressed yourself flat to the ground and created a vacuum seal around your body, but if any gap were left for gas to pass under you, the pressure below you would equalize with that above you, and you would be “weightless”.
So no, fluid pressure can theoretically hold an object against a surface if there is no flow between them, but it could not cause any objects to accelerate in a certain direction.
