- The dream sequences. All of them.
- The numerous family-unfriendly deaths in the movie. This includes Felicity's decapitation, and kittens being ripped out of their mother's womb. And no, there is no Gory Discretion Shot. Then again, the deaths already happened when Francis gets to them save for Claudandus.
- Felicity is arguably the worst, even compared to Solitaire and her torn-out kittens. Francis finds her with her head torn off and moved to one side, staring blindly out. What he says later makes it even worse: 'It was as if, even in the moment of her death, she still was straining to see...'
- During the cult scene, some cats get electrocuted voluntarily as part of the Claudandus ritual, getting more and more crazed with each jolt. Even Francis lampshades that what he's watching "is not a scene out of The Aristocats." In the novel Francis also mentions the Aristocats.
- After Francis finds out that Pascal/Claudandus is the one behind the murders, he destroys the computer containing said information on the murders, subsequently causing an electrical fire. The final battle between Francis and Claudandus plays out like Simba and Scar's final battle, only Claudandus gets clawed in the stomach, ripping it wide open, causing all of his guts to spill out. Don't eat anything while watching the scene.
- The footage of Pretarius testing his compounds on the cats, which sadly has some truth in television. It's so gruesome the fact that he's doing it while drunk on cheap wine actually isn't the worst part of it.
- The worst part of it all: Claudandus's plan would not have worked. Like every "master race" madman before him, he operated under a complete misunderstanding of evolutionary theory that really only existed to serve his own ego. All of this was pointless.
- The film, like its spiritual cousin Watership Down, gives a very frank, dark look at what our cuddly, beloved pets are really like. No, obviously they aren't really evil masterminds, nor do they secretly have their own little society behind our backs (probably), but as far as the violence, sex, and killing, that's what cats are really like. We can anthromorphise them all we like, but at the end of the day, cats are not humans. They're a barely domesticated predator species that sticks around because humans offer food and comfort.
- Isn't it more about them being more similar to humans than we usually want to admit? Violence, sex, and killing, and even ideological delusions about breeding genetically pure master races, aren't exactly things humans consistantly stay away from either.
Nightmare Fuel / Felidae