you had all finished fighting with a curse and Mei Mei had come to dive you back.

Mei Mei: oh by the way, where’s the curtain? (a curtain is casted before a fight so when it is lifted there is not damage to the real world.

Gojo: he freezes and remembers that he forgot to cast one.

Geto: he realises that they didn’t cast one.

Shoko: she freezes when the question is asked.

Utahime: she remembers that they should’ve casted one but didn’t.