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# ...apparently:
No, it won't hover: it will go right past, and gently come to a perfect stop at the antipodes...
And then start to fall back, and arrive back here about 90 minutes after you dropped it.

This seems plausible, but I haven't tried it yet.
Needs hole to have no air, and Earth not to be turning (I think). Or go between North pole and South pole. And have a 'marble' made of something like tungsten. And have the hole not fill up with water, magma, etc.
(, Tue 27 Jan 2009, 14:08, archived)