My aunt was writing a novel and realized she had too many "J" names. She changed the algebra teacher's name from "Mr. James" to "Mr. Ridenour." Well, she didn't want to bother with changing one at a time, so she just hit "replace all."
What she had forgotten was that she also wrote about Jesus and three of his apostles elsewhere in the novel. "Replace All" officially listed these three apostles as "Peter, Ridenour, and John."