Carry On Doctor (1967)

Continuity mistake: Jim Dale and Anita Harris think that Barbara Windsor is going to jump off the roof and race across the road into the nurse's block. We see Anita Harris is wearing dark seamed hosiery as she runs up the stairs. A few minutes later she hangs down from the roof and the seams have disappeared from the backs of her legs. (00:59:00 - 01:01:55)

Dr James Kilmore: Just as I thought. You fell on your coccyx.
Francis Bigger: I did not. I fell on my back.
Dr James Kilmore: Your coccyx is at the base of the spine.
Francis Bigger: Well I've never heard it called that before.

Trivia: This film contains a reference to "Carry On Nurse" (1959), specifically the daffodil thermometer scene. When a nurse approaches Frankie Howerd with a daffodil, he says "Oh no you don't! I saw that film!"