Petite Étrangère - Répercussion

It's in the middle of one of their totally-studying-pillow-fight-tickle-torture-dogpiles when Usagi has a flashback. Rei notices first, hears a choked sound, sees the utter terror in Usagi's eyes, and immediately rushes to pull everyone off of Usagi. (Scenes after the Petite Étrangère musical, which covers the Black Moon arc)