Same here. I mean, I figure we'll all be put back where and when we started from, unless the train wants to cause some really insane time paradoxes, but still, I'd rather not wait that long if we can help it.

As for the platforms, no idea. Even if it did have its own atmosphere, you wouldn't think there'd be enough of it there to really make rain or snow or something. You need a lot of evaporated water to make clouds, after all.