02:11:30 AM Apr 27th 2015
I've not added this to the article as I'm unsure of the details. But isn't there an episode of Doctor Who where the TARDIS ends up landing awkwardly on its back with the door upwards, so that the gravitational field inside the TARDIS is at ninety degrees to that prevailing outside? The TARDIS door effectively becomes a portal delineating a sharp interface between two different gravitational systems, and the Doctor (and companions) are foxed for a while as to how best to get out? (Apparently not as easy as it seems as whilst leaving, different parts of your body are subjected to different gravitational pulls, or something). I think this is original series, might have been Peter Davidson or Colin Baker-era. The sort of paradox Douglas Adams would have enjoyed writing.