Abbott and Costello Meet Frankenstein (1948)

Larry Talbot: Soon the moon will rise. I've taken the room across the hall; here's the key, lock me in.
Wilbur Grey: Lock you in?
Larry Talbot: Yes, please. Hurry.
[to Chick]
Wilbur Grey: He's scared too.

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Wilbur Grey: I've had this brain for thirty years. It hasn't done me any good!

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Chick Young: Well after what I saw, there'd better not be any 'maybe'.

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Glenn Strange was playing the Frankenstein monster, but during shooting one day he tripped over a camera cable and broke his ankle. Lon Chaney Jr. (playing the Wolf Man) wasn't working that day, so he put on the Frankenstein makeup/outfit and filled in for Strange in one scene where Dr. Mornay gets thrown through the window. So Chaney wound up playing two monsters in this movie.
During the final chase scene, when Wilbur and Chick are standing in front of a door and the Frankenstein monster punches through it, Lou Costello deliberately went off his mark and got hit on the jaw. The director liked his reaction, so he decided to keep it in the film.
Lou Costello did not want to film the movie, declaring, "No way I'll do that crap. My little girl could write something better than this." A $50,000 advance in salary and the signing of director Charles Barton, the team's good friend and the man whom some call their best director, convinced him otherwise.
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