These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Moral Event Horizon: Crossed by the Mother Superior at a convent when she has Papillon returned to Devil's Island. It didn't help that Papillon had just admitted to her that he isn't a murderer (he had been imprisoned on the charge of killing a pimp). He said he wasn't guilty, but when the guards came for him, she callously decided to leave his life in God's hands. Granted, it did work out for him in the long run, but with holy people like her, who needs the devil himself?
Nightmare Fuel: Both dreams Papillon has while in solitary confinement. Especially the second one. "You're deeeeaaaaaddd..."