Newt flashes the assembled group the same sort of smile he used to use when lying outright to his professors at Hogwarts; the same smile that lets people assume that of course he's trustworthy; what reason does he have to lie, anyway?

"I also saw some Carta dwarves eyeing that same passageway, so you may want to hurry," he adds, just to add credence to the tale. "Or all of the best bits might be gone."

Soon, they've turned their backs, and quickened their pace, after that little flourish of Newt's. He follows her quickly, eager to be out of here himself.

But what she says catches his attention, and he observes her as they flee.

"When what wears off, exactly?" He can't help but ask.