* ''WesternAnimation/WhatANightmareCharlieBrown!'': Snoopy is abused and starved, becomes ''feral,'' and then dies getting pulled into a frozen lake, screaming and clawing for his life. Even if the whole special ''was'' [[AllJustADream just a nightmare]], one could argue that this was inappropriate for the ''Peanuts'' specials' target audience.
* In one strip, Charlie Brown, not having a kite to fly, attaches some string to Snoopy's collar and uses ''him'' as a kite, who uses his ears to create the lift needed to fly. But it doesn't work for long, and Snoopy plummets to the ground and ''SHATTERS into a hundred pieces!!'' Luckily it was just Snoopy having a nightmare from eating too much before sleeping, but still, that image of him shattering in front of his master must've upset a LOT of kids at the time! [[http://www.gocomics.com/peanuts/1965/06/06 Here's the link]] for those who want it.
* In ''WesternAnimation/ABoyNamedCharlieBrown'' we get a DisneyAcidSequence to the tune of Beethoven's Piano Sonata No. 8. Not only does it [[BigLippedAlligatorMoment totally come out of nowhere,]] but those foreboding church paintings and that....[[NightmareFace face ]] thing at the end floating around on a pure [[NothingIsScarier black background]] can look VERY unsettling to you as a child.
* In ''It's a Mystery Charlie Brown!'', Snoopy and Woodstock sneak into the school's science fair to reclaim Woodstock's nest but also play around with some of the exhibits. When one of them gives Snoopy an electrical shock, not only does he scream, but he also briefly ''[[XRaySparks turns into a skeleton!]]'' Incredibly freaky for a ''Peanuts'' cartoon.
* One story arc has Linus's blanket [[AnimateInanimateObject come to life]] and start stalking and attacking Lucy at every opportunity to the point where she stays outside all night hiding from it. At one point it lunges out of Linus's hands at her, and it has a ''mouth''.
* In one very old series of strips set in winter back in February of 1960, Snoopy wakes up to find an icicle the size of a sword dangling over his doghouse, and was too terrified to budge an inch, lest it crash down and kill him. Eventually, Charlie Brown convinced him to make a dash for it by placing a freshly-baked pizza several hundred yards away; when he caught a whiff of his favorite food, he charged for it and escaped, ''just in time'', as true to his fear, the icicle crashed down and destroyed the doghouse. What was terrifying was how much TruthInTelevision this is icicles ''can'' and ''have'' killed people. To be fair though, it does end with a [[CrowningMomentOfFunny Crowning Line of Funny]]:
--> '''Charlie Brown and Lucy''': Saved by a Pizza!
--> '''Snoopy''': Oh, Good Grief!
* The art style for Creator/BlueSkyStudios' [[WesternAnimation/{{Peanuts}} movie adaptation]] can have an UncannyValley effect on some viewers.
* The way Lucy was originally depicted in the strip can have a potentially UncannyValley feel as well. Just [[http://vignette1.wikia.nocookie.net/peanuts/images/7/77/19520330.gif/revision/latest?cb=20130329165655 look at her]].
* At the beginning of the "Suppertime" segment in "You're A Good Man, Charlie Brown!", Snoopy imagines himself starving to death and we see his skeleton.
* The strip from October 21, 1984 features Snoopy and the Beagle Scouts sitting around a campfire at night. Snoopy tells them that there's a full moon out, and that they had better be careful, because when the full moon is out, he turns into a "Werebeagle". Snoopy is briefly shown as a Werebeagle for a single panel, which scares the Beagle Scouts.
* Though it's not official, [[https://www.youtube.com/watch?v=3OTqvbh8Hko WITS did a sketch]] of an "unpublished lost strip", with Creator/PagetBrewster as Lucy, regarding the ol' classic football gag. Except that she insists that she never pulled the football away, and he's just imagining it. Like the kite-eating tree, or [[spoiler:Snoopy being alive.]] It's not clear which is worse; the idea that Charlie's been hallucinating ''everything'' we just chalked up to "comic strip weirdness", or that a little girl is ''that'' good at {{gaslighting}} someone.
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