Continuity mistake: When Jimmy Stewart is talking to his girlfriend, he gives her a flower, and at different points in the conversation, she has it over her shoulder, or on her lap, depending on the angle of the shot.
You Can't Take It With You (1938)
1 mistake - chronological order
Directed by: Frank Capra
Starring: James Stewart, Jean Arthur, Lionel Barrymore, Edward Arnold
Alice Sycamore: Have you ever been in a monastery?
Tony Kirby: No, but I'm the fella who got caught in a cave once.
Alice Sycamore: Were you? Whatever happened to you?
Tony Kirby: Well, the cave caved in and I haven't been heard from since.