You could roughly find all that information out :P. Also we could logically gander general similarities to Earth by how birds fly and airships work. In FFXIV 2.0 we can also use female bust and bounce to calculate the extent of gravity..

lol
I dont like "magic" as the response at least in basic response. Some made up bullshit always settles better for me, like when reading a fantasy book they hardly ever say "becuz..." but rather spend a few paragraphs to pages talking about the nature of whats going on.
I really do think the animations are impractical but without animation blending I'm not sure how much you could improve it and not have it look worse in different ways.
@Tent jumping - invisible walls = standing on tent, both are bleh. But I'd rather be able to stand on a tent then be blocked from landing somewhere it looks I can land.
Though I said before just make the top of the tent slide you off, so if you land on it you slide off like snowboarding or something.