You won't find intelligent answers here.
daamn, thats a really good question. i think you would pass out and/or die from the speed at which you are falling.
my other thought is that while you are falling down towards the center of earth, gravity is pulling you down. but when you go through the middle then gravity would be pushing you down, therefore slowing you down and you would eventually just be stuck in a big ass hole because you wouldnt have enough speed to make it out the other side