Due to the nature of Gritty Reboots, lots of childhood killing nightmares are to be expected.
- Adventure Time:
- Ooo is slowly becoming a lifeless Death World as The Magic Goes Away, and we get to see all the delightful imagery that comes with it—such as the rotting corpses of Lady Rainicorn and Lumpy Space Princess.
- An easily missed detail, but there's a missing person poster with Betty on it at one point.
- Finn decapitating Lemongrab. Though given Lemongrab's reputation, this also counts as a Take That, Scrappy! moment.
- Princess Bubblegum is slowly dying, and occasionally coughs up candy "blood" from her mouth. Additionally, when she wonders if there's someone who can help them, we get a Jump Scare of the Ice King.
- Marceline is trapped in a block of ice, and it's implied that the Ice King himself did that to her (something he's evidently racked with guilt over).
- In the end, it's implied that Finn and Jake will have to detonate the Mushroom Bomb again. This will restore Ooo...at the cost of everyone's lives, including Finn and Jake's.
- If You Give A Mouse A Cookie
- Quite possibly their darkest work yet: It's all done in one shot, panning through a house with various dark call backs to the original books, including a man choking to death on a cookie, a man drinking milk until he vomits and a man sobbing hysterically while cutting out chunks of his own hair with scissors. Then it passes multiple creepy drawings of mice on the wall before showing a man screaming at the titular mouse that he can't give it any more things...and the horrifically creepy Mouse is sitting there with a huge knife in its hands...
Man: WHAT MORE DO YOU WANT FROM ME!?
Mouse: Your life. - Calvin and Hobbes:
- Calvin's imagination is going completely out of control. It knows Calvin's growing up and it's ticked the heck off, trying everything it can to force Calvin back into it. Soon enough, it does the one thing it knows Calvin will react to: kidnap Hobbes.
- The montage of Calvin and Susie's Journey to the Center of the Mind has such lovely imagery as Calvin being chased by hoards of his old snowfiends and Susie nearly falling off of a building.
