* AlternativeCharacterInterpretation: Is Mademoiselle truly a CompleteMonster who will torture children to death to accomplish her goals, or simply a philosopher desperate to find out about the Afterlife because of her old age? She justifies her action as [[ForScience For Philosophy]] but does that merit permission to use torture as the means to discover the secrets of martyrdom? And why did she commit suicide once she found out from Anna what really was the Other World?
* DarknessInducedAudienceApathy: One of the most nihilistically depressing movies ever made. It ''starts'' with the supposed heroine gruesomely gunning down a terrifed family with two kids, PrettyLittleHeadshots and GoryDiscretionShot both thoroughly averted, and it goes [[FromBadToWorse downhill]] [[DiabolusExMachina and]] [[ColdBloodedTorture far]] [[TheHeroDies far]] [[DownerEnding beyond after that]].
* ParanoiaFuel: Just think, your completely normal neighbors could have their very own TortureCellar.
* TheWoobie: Arguably the girl rescued by Anna but reduced to feral insanity because of Mademoiselle's tortures.