He shakes his head. "My world's not tiny, or at least I don't think so. It's just more than 99% uninhabitable. You can't live on the solid land in my world, it's hotter than an oven down there and the air is poisonous. So everyone has to live dozens of klicks above it on piles of this sort of - floating rock. Here, I have some in my pocket."

He produces the rock. It floats upward when he lets it go, moving sideways in the breeze until he catches it. "That isn't magic, by the way. It floats on air by being lighter than it, the same way things float on water."