Shouldn't be a problem, there's some sort of 'return from where you fell out' thing going on as far as anyone can tell.

[Human lifespans are short but at least that's easy?]

Right now I think that's a bit up in the air? There was something about communicating with the entity that we think is responsible, but I haven't been engaged on that end of things very much. I tend to keep track of the more practical end like supplies and the like.