I have two questions right now, so if someone could answer them, I'd be greatful. When your center of gravity isn't supported very well, for example, when you lean over too far, it is difficult to stand, and not fall down, could someone explain why this is? Second, if gravity was stronger(though I'm not sure how strong it would have to be), would it pull us through the ground? I'm just wondering, because I know that the normal force keeps us from accelerating into the ground, but is there a limit to the upwards force the ground can apply to us? That's all for now, thanks in advance for any help I get.