Potter Mania (a.k.a., a retrospective short story)

This is a public service announcement. There will be no broom flying in the store. Those caught flying in the store will have their brooms impounded.
I couldn’t help but burst into a laughing fit. Evidently, I was the only one who found the announcement humorous because no one else laughed with me (although there were a couple people who giggled and/or stared at me).
So concluded my first—and last—experience at a Harry Potter publishing event extravaganza.
[Note: I neither took the above picture nor do I know the individuals in it.]