So the diagram actually isn't on the floor. It's on a table. The table is in a room with high enough ceilings that you can stand on top of the table if you so choose, but why would anyone do that? Chanai, who is alternately sketching the vaguely circular array he wants to use for a spell and using the space around the edges of the same paper for notetaking, is sure not expecting anyone to stand on the table. In fact, none of the people in this room are expecting anyone to do that.
cam in sja
from_scratch
"Why's that? I'd expect the first wave of people who're coming back to have eager relatives willing to host them."
"Because I think it only gets more awkward to take a month off plus travel time once people are more used to you."
from_scratch
"You're not wrong. ...I am planning to copy someone else's idea for an ecology that will work acceptably without and gracefully tolerate the introduction of animals other than bugs and fish, and should check how well that idea matches the things people on this planet want."