Cam catches a summons while he's in the middle of Atriama. He's seen it before, it's fine.
"What is the local definition of 'gravity'?"
"The force which pulls stuff down?"
"And it does this in a way that evens out air temperature?"
"Yes. There's about the same range of mostly human-friendly temperatures even very far down. It's part of why universal warming could have been such an issue and we had to spend the Age of Cancer learning how to avoid it."
"Huh. Gravity in my world is not like that, it just pulls everything toward everything else proportionally to their sizes, dropping off with distance, and it's a sizable force near a planet but can be overcome with sufficient applications of other phenomena with their own opinions about where things ought to be."
"It would be even stranger if our versions somehow worked more similarly, don't you think?"
"Our version would certainly make an infinite cylinder rather difficult!"