When they go round the moon, the Artemis astronauts will be completely out of contact for 40 minutes. What's the single funniest (yet feasible) thing they could do when they get back in touch?
@stavvers
Change names, and insist they've always had those names.

@Oggie @stavvers
similar and what we used to do to our biology teacher in any class she gave in the afternoon* is simply everyone to change seats.

(* she was always drunk by the afternoon, so sorry)

@Oggie @stavvers
When asked, change birth dates, too. To a few years in the future.