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Nightmare Fuel: 2 Stupid Dogs
The Super Secret Secret Squirrel episode "Greg," in which the titular evil gingerbread man sends an army of ants to steal vast amounts of candy to create an enormous gingerbread man of his own. In the end, Secret Squirrel and Morocco eat Greg's creation. And then the ants eat Greg. Alive.
Ironically enough, I could have been meant as a past the radar reference to voraphillia and masochism.
"Inside Out": After Little Dog bites the electric ball from the museum and gets shocked we are treated to a very freaky scene of a flashing background with electric lines coming down behind it, and a very scary tiki-god like head staring at the viewer saying in a high-pitched voice "Foolish canine, I am not your friend." and laughs evilly. Then it goes back to normal like nothing happens for a big-lipped alligator moment that was freaky!