Vanilla Sky (2001) - 17 mistakes
Directed by Cameron Crowe, starring Cameron Diaz, Jason Lee, Kurt Russell, Penélope Cruz, Tom Cruise
Please note: Apologies if this gives anything away, but it's been out a while. It's made very clear by "tech support" towards the end, that everything AFTER the night at the club was part of the lucid dream. Therefore everything BEFORE the night in the club is 100% real and normal (except for obvious dreams, like the one at the start), so any mistakes in that section of the film are either fun stuff to spot, or real mistakes, and cannot be explained away by the "lucid dream".
Visible crew/equipment: When Tom Cruise is standing alone in the hall at the ground floor of the LE building, screaming for "Tech Support..." the camera pans around him 360 degrees. When the camera pans over Tom's left shoulder, you can see the shadows of the camera crew on his jacket. After the panning has come to a stop, you can see the reflection of two or three crew-members in the glass walls behind him.
Continuity: When the panel of doctors are being queried by Aames, for the second time of the loop of this interview, the black box containing the mask can clearly be seen in the bottom right hand corner on the desk when the camera swings to the main doctor. When the camera pans back again, it is gone, and it is only after this that the assistant brings in the box.
Continuity: In a scene during David's birthday party there is a sequence showing Julie and Brian talking on a sofa with a blank white wall in the background. Later, in a different scene showing Julie dancing with one of the waiters holding a tray of martinis in front of the same sofa, there is a black and white picture of a car in the background.
Revealing: During the love scene towards the end of the film, with David and Julie, it is obvious that Cameron Diaz (who played Julie) is only in the bed for her shots. The reverse angle of David shows him making love, but other than a badly-matched wig on the pillow there is nothing to stand in for Diaz. There is no sight of her body or head, and the wig is the wrong color and shape, not to mention it looks like a wig.
Continuity: When David and Sophia go upstairs to his friend's apartment, his friend walks in. When he is talking to David in this scene, in one shot David's hair is perfectly normal, and then there is a shot of his friend, but when it comes back to David his hair is abnormally messy and sticking up. In the next shot of David it's back to being flat again.