Blithe Spirit (1945)

Continuity mistake: Just before Charles sees Elvira, he takes a cigarette from a box and lights it, but when he goes to get a drink, the cigarette is gone.

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Charles Condomine: Try to see my point of view, dear. I've been married to Ruth for five years and you've been dead for seven.
Elvira Condomine: Not dead, Charles. Passed over. Its considered very vulgar to say dead where I come from.

Question: What was the point of showing us the living-room doors opening, then closing, after Ruth has gone to bed, leaving Charles and Elvira alone?

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