Revealing mistake: When Leland Palmer is locked in the cell he starts screaming and runs headlong into one wall, then the other. The first wall wobbles noticeably on impact, indicating it is being shot on a set.
Twin Peaks (1990)
1 revealing mistake in Episode Sixteen - chronological order
Starring: Kyle MacLachlan, Madchen Amick, Dana Ashbrook, Michael Ontkean
Genres: Crime, Drama, Fantasy, Horror, Mystery, Romance, Sci-fi, Thriller
Visible crew/equipment: When Audrey enters her father's office to find him in the middle of his Civil War recreation, a boom mic dips into the shot over their heads. (00:18:40)
Catherine Packard Martell: Didn't he want to talk to me?
Pete Martell: Yeah, but we told him you were on your world tour, he should contact your press agent.
More trivia for Twin Peaks
Question: Has David Lynch ever explained why the beings in the lodge talk funny?
Answer: The answer to pretty much any question beginning with "Has David Lynch ever explained _______?" is: no.