The entire concept of Ice Cream Bus: after eating ice cream and taking rides in an evil ice cream bus, children eventually turn into piles of ice cream. A scene of particular hilarity is after the protagonist finds his son licking piles of ice cream in their apartment, his son tells him that all of his friends have turned into ice cream, and his head immediately falls off mid-lick and melts on the floor.
In the story Long Dream, when one poor guy falls asleep, his dreams take him through up to ten years of doing terrifying or monotonous activities. Most of the dreams he describes are unpleasant or horrible, but then he mentions one where he spent "eight years searching for a toilet that doesn't exist. How do you think that feels?"