But if it is flat then when all the water spills off the top of the ice wall we'll all get pulled off the edges by the water flow.
Or, I dunno, does the firmament stop water? It has to, right? Otherwise all the air would also escape. In which case the water will just build up and up until the entire snow globe is filled to the top!
Then we end up in a Truman Show scenario where we can just literally sail to the edge of the Earth but not fall off because we hit the sky box I guess?
I used to keep my patio door open at my third floor apartment years ago while i was at work. Came home one day and one of my cats were missing. I flipped out drove around my apartment calling her name yelling at the top of my lungs getting stared at the whole time. Completely freaking out, as im getting a drink from my fridge i see her just laying down looking at me from atop it like im crazy.
My cat doesn't climb things, she likes being close to the floor. And when she does jump up on tables or counters she's very careful not to knock anything over.