[ Look, she could be from an island nation that does a lot of diving. They definitely exist.

Gregor just raises an eyebrow at her look. ] What I'm getting at is that you're using the planet as a reference. Yes? Even if you're underwater and lose track temporarily, or if you're suspended somehow else, you'll always be thinking of 'up' as away from the center of the planet, and 'down' as toward it.