Science question: need some help!!! I have a question thats been bugging me for ages: If someone were to drill a hole through the Earth and jump into it. Let say the tunnel spans from the North to South, and we ignore the limiting factors, such as the extreme heat and the hole won't collapse and there is sufficient oxygen, what will happen? I remember reading it from the Popular Science magazine (June 2005) and I really need to know what will happen, because I forgot the answer and why! Will the guy just pass through the tunnel and end up on the other side, or will he go through the tunnel and stop at the center of the Earth as a result of gravity?