Paranoid viewers might capture the scent of a thing "off," the way people today with hyperosmia know the milk’s long gone bad before opening up the carton, but noticing the clues that Meyers, screenwriter Alan Trezza and the film’s primary cast-Alexandra Daddario, Maddie Hasson and Amy Forsyth-go away on the screen requires a tiny deductive reasoning and a lot of psychological study.