Deliberate mistake: Jimmy catches a fly in the air and puts it in his mouth. He then spits it out with great power. You then hear a "Bzzzzz." assuredly made by the fly. How can a fly flap its wings when spit out in that velocity? (00:48:30)
The Whole Nine Yards (2000)
1 deliberate mistake
Directed by: Jonathan Lynn
Starring: Bruce Willis, Kevin Pollak, Amanda Peet, Michael Clarke Duncan, Natasha Henstridge, Matthew Perry, Rosanna Arquette
Continuity mistake: When Mathew Perry goes to Chicago to meet with the head Boss, Bruce Willis' wife comes to talk with him at the hotel. In the scene where he is brushing his teeth he picks up the mouthwash bottle and swigs some, then sets the bottle down on the counter. The camera cuts back to her, then back to Matthew Perry, and the mouthwash is gone. (00:32:50)
Janni Gogolack: You know I have this same car?
Nicholas "Oz" Oseransky: Really?
Janni Gogolack: No.
Trivia: Matthew Perry bet Bruce Willis that if the film would open at the top of the charts in the US (which it did) he would have to guest in an episode of Friends for free (which he did, plus all further episode payments were given to charity).