Deliberate mistake: Director Adam McKay states on the commentary that they went to the island Catalina for location searches and realised that he did not really like the island. Instead, on the coast and during several scenes, the island of Catalina can be seen in the background. He chose not to have it digitally edited out as a joke.
Step Brothers (2008)
1 deliberate mistake - chronological order
Directed by: Adam McKay
Starring: Will Ferrell, John C. Reilly, Richard Jenkins, Mary Steenburgen, Adam Scott
Genres: Comedy
Continuity mistake: When Brennan rubs his nuts on Dale's drums, Dale comes in and starts fighting with him. Brennan doesn't have a chance to put "them" away but in the next shot his zipper is up.
Brennan Huff: You're not a doctor. You're a big fat curly headed fuck!
Trivia: Mary Steenburgen plays Will Ferrell's mother in the movie, even though in real life she's only 14 years older than him.
Question: Is Jack Handle actually a person in Step Brothers? Cause if so, we only hear his name when Robert announces that's who he will be moving in with.
Answer: I doubt it's a person. Jack likely refers to Jack Daniel's, and a handle is usually referred to as a half gallon. Hence the name Jack Handle.