The elevator operator, and those eyes! It doesn't help that the elevator itself is swinging like a flag in the wind.
An antropomorphic bust of Terwilliker's head gives Bart this advice: Bartholmeow Collins, the years you spend with Dr. Terwilliker will be the happiest years of your life! But if you get homesick, don't try to escape. The barbed wire around the Terwilliker institute, isELECTRIFIED! ELECTRIFIED! ELECTRIFIED
Bart's expression was pretty scared....
Second Verse Curse: The third stanza of the "Dungeon song" was cut out due to increasingly horrific lyrics. (The casual reference to "gas chambers" less than 10 years after The Holocaust did not help.)
THIRD FLOOR DUNGEON! Household appliances.
Spike beds, electric chairs, gas chambers, roasting pots, and scalping devices.
What Do You Mean, It's for Kids?: Fun for the family, unless you're the sort of person who has nightmares about nuclear weapons or imprisonment at a summer camp or hearing a kid practice piano scales over and over and over and over...