Hypothetically, if a hole was dug through the diameter of the world (so from the United States, the hole would open someplace in the southern hemisphere near the Indian Ocean), if a guy jumped in, wouldn't he sort of get stuck in the middle rather than pop out the other end?
I never thought of that. I'll have to equip the girls with anti-gravity boots before they jump through their hole.
Well by the time he got to the middle he would of melted away, if that wouldnt have happened gravity would crush him to a pretty small size and then instead of winging it out the other side you would circle endlessly in the center.
If there is air in the hole a person falling through this hole would only go a short way past the center, then fall back past it again, eventually stopping weightless at the center. Disregarding air, heat, etc. he would pop up on the other side, then fall back through the center again, popping up at his point of origin. Basically he would be in continuous free fall, like a satellite.
If he did that in vacuum, and managed to avoid hitting the walls, and the planet were a perfect sphere, he would reach the other side at precisely zero velocity.