I was just watching a program on tv about gravity. The showed one example of a tube through the Earth from one point on the Earth to another point on the Earth's surface. This shows how we would accelerate relative to the Earth until we reached the centre, and then decelerate until we get to the second point, and then return in the same way on the way back in a continuous back and forth yoyo. What they didn't mention and I think is true - but please correct me - is that if you boarded a sealed capsule which had one end up and some nice pictures to show the original up direction - that when the sealed capsule was dropped you would not ever be able to tell where you were by feel. You would feel weightless the entire journey and - apart from the pictures - lose all concept of up and down. There would be no feeling of acceleration or deceleration and there would be no feeling of changing direction of motion at anytime. Is that correct?