The Ladykillers (1955)

Continuity mistake: During the robbery, the taxi driven by Danny Green changes from an Austin to a Morris Oxford and back again. Both types are the same colour, but the Austin is the one with the rounded radiator grille, and the Oxford has a flat radiator.

Revealing mistake: During the scene where the gang attempt to catch the parrot, One-Round gets his legs stuck in a chair and falls over, breaking the chair in the process. About a minute later Herbert Lom breaks the record and it cuts back to One-Round, and the exact same shot of him falling over is seen again.

Continuity mistake: After dropping Harry from the bridge, during the short shot of One-Round, a train appears on the tracks behind Marcus and Louis. (01:21:35)

jle

Professor Marcus: One-Round, there is a wheelbarrow outside, could you fetch it? The Major has a train to catch.

Louis: She had to go. She asked for it. She's probably been asking for it all her life.
Harry: Yeah! Look what she done to that barrow boy and-and the cabbie and the junkman. All of them out of business in ten minutes.

Mrs. Louisa Wilberforce: Professor, I must give you back your ten shillings. You see, the cabber wouldn't take any money, because he said he was going into some other business.