Continuity mistake: When Dr. Frankenstein introduces himself to the monster with a soothing "Hello, there", his right hand is on the restraint over the monster's chest. The next shot shows the doctor placing his hand on the restraint again.
Young Frankenstein (1974)
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Directed by: Mel Brooks
Starring: Peter Boyle, Gene Wilder, Teri Garr, Madeline Kahn, Marty Feldman
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More mistakes in Young Frankenstein
[A wolf is heard howling in the distance.]
Inga: Werewolf.
Frederick: Werewolf?
Igor: There.
Frederick: What?
Igor: [Points to moors] There wolf. [Points forward] There castle.
Frederick: Why are you talking like that?
Igor: I though you wanted to.
Frederick: No, I don't want to.
Igor: Suit yourself. I'm easy.
More questions & answers from Young Frankenstein
Answer: She most likely missed Frederick and wanted to be with him.