Gnu in the Zoo — 6 of 30

Section 4 - The sky

[Basically, an uncovered room is outside (i.e. has sky) whereas a covered one isn't.]

A room can be covered or uncovered.

The sky is backdrop.

Looking up is an action applying to nothing. Understand "look up" as looking up.

Instead of looking up:

if the location is uncovered, try examining the sky;

otherwise say "You don’t like ceilings. They make you feel claustrophobic."