Ignoring effects of air resistance, you would experience pendular motion. That is, you would reach approximately the same distance from the center on the other side. "Approximately" because the Earth is not uniformly dense.

If you were to brake yourself and stop at the center you'd become trapped. Not because the center is pulling you towards it, but because all the atoms of the Earth are simultaneously pulling you away from the center in all directions.

Another interesting aspect is that as you get closer to the center you'll experience an increasingly weaker acceleration from gravity, because there's less planet under you to pull you down.

interesting

Gravity is actually the force of all bodies in the universe pulling on all other bodies in the universe. However, the strength of the pull weakens with the square of the distance between two given bodies. Since the celestial bodies in the universe are so far apart, you can say for conveniences sake that you are only under the effect of the gravity of the nearest one (the earth).; in reality though, you are even (very, very weakly) being pulled towards other people, which means that the "your momma" joke about her having a gravitational pull is technically true.

You would lose energy and slowly oscillate and then come to a stop at the center.

File 150038406684.jpg - (583.52KB , 8525x4795 , renakinblue - Copy.jpg )

You would bounce a view times around the center just like in that star wars spoof scene- like a jojo or what that crap is called...

you would be trapped like a spring

>people still doesn't know how gravity doesn't work

If there was a hole like that then the planet would just merge back into a ball because o gravity. Let's say it doesn't then it means the whole planet somehow lost a lot of mass which means that the planet is going to fall to you because your gravity pulls it to you.

If a hole were possible then common sense says jump in ..fall to the center at ever increasing speed past the center slowing down all the way to the outside rim but not quite far enough to grab the rim. Fall back in again and out again loosing a bit each time till stuck in the center.

Falling into a black hole would be different .Falling Falling Falling Faster Faster Faster SPLAT!