Lets say you're on a spaceship, and the floor of the ship is pulling you and the other objects in your ship toward it. (it might be easier to think of this in terms of a computer simulation) If you go beneath the floor of your ship, you are not affected by it's artificial gravity. Now think about this: If you put all of the objects in your ship towards the front end, would it start to dip down due to the 'weight'? Think about how a ship dips down in the ocean when more weight is added to the front or back. If it did start to dip down, would your ship start to spin- like a seesaw only without the ground underneath it? Maybe this makes no sense at all.