The laws of physics suddenly returning, the flight attendant realized that tearing off the plane's "roof" while the plane was flying upside-down might not have been the best idea as the former passengers began falling from the plane onto the ground and people below like rain falling onto a busy antbed in the middle of a thunderstorm.
(UPDATE: The original story now is in a spoiler tag, to save space on the first page. Thank you, SavageWolf !)