What would happen if you drilled a hole through the earth?

If you were to drill a hole through the Earth, you would create a tunnel that goes from one side of the planet to the other. Gravity would pull you towards the center of the Earth, and you would experience weightlessness at the midpoint. The journey would be extremely hot and the pressure would increase as you got closer to the center. It is not physically possible to drill a hole through the Earth due to the extreme conditions and technological limitations.