Trivia: Ratman's Notebooks
- Breakaway Pop Hit: Michael Jackson's performance of "Ben" (which was written for the original movie's 1973 sequel) is probably more popular than either the book or the two movies.
- Hey, It's That Guy!:
- Hey, It's That Voice!: An odd case of this trope occurring in a live-action movie. In the 2003 film, one of Willard's co-workers is played by Laara Sadiq (Chi-Chi from the Ocean dub of Dragon Ball Z), and it's very obvious whenever the character opens her mouth. For what it's worth, the character is named Janice Mantis in the credits, but is never referred to by name at all in the movie proper.
- Keep Circulating the Tapes: The book is out of print (though it can be found on amazon, the copies are often in horrible condition) and the 1971 movie is only on VHS.
- Too Soon: Arguably an inversion. Robert Bloch wrote Psycho when the Ed Gein case was still fresh in the public's mind. For whatever reason, Gilbert waited 8 years. Each book was adapted to film, and each film had a remake, but Bloch's yarn is definitely more well-known. If there was ever a case against tactfulness, this would be it.