Yep, that was fun!

Another moment of clarity for me (I have them from time to time, usually after a Bourbon) was that although you would be weightless (kind of) at the centre of the earth (or at least the centre of gravity) that doesn't mean gravity-less. You are still subject to the entire gravity of the earth (just like on the surface) it's just that it is acting in every direction, so every direction is cancelled out by its opposite.

And the pressure you feel isn't so much about weight (which is just the effect of mass and gravity) but more about the atoms and particles that make you up pushing back against the forces acting against you.

So you're jam in other words!

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If something is in me which can be called religious then it is the unbounded admiration for the structure of the world so far as our science can reveal it... of the manifestations of the profoundest reason and the most radiant beauty, which are only accessible to our reason in their most elementary forms...
Albert Einstein