Revealing mistake: In the scene where the girl is going to shoot Vincent Price watch closely as she pulls the trigger. You can see the wires pulling the gun from beneath to give it the realism of the blast.
House on Haunted Hill (1959)
1 revealing mistake
Directed by: William Castle, Rosemary Horvath
Starring: Vincent Price, Richard Long, Alan Marshal, Carol Ohmart
Factual error: As Frederick is explaining to his guests how to use their .45 automatics, he fires one round at a near-by vase, shattering it. However, it leaves no bullet hole in the wall directly behind the vase.
Frederick Loren: What husband hasn't wanted to kill his wife at some time during their marriage?
Question: In the scene where Mrs Loren appears at the window of Nora's room. Since Mrs Loren and the doctor are faking Mrs. Loren's death and apparition, how did they manage to make the rope go round her feet? Also how did Mrs Loren glide in and out?
Chosen answer: As far as the "gliding in and out", Mrs Loren presumably uses the same body harness she used to fake her hanging. As to the rope... the film is deliberately ambiguous on whether or not the ghosts are real, as evinced by the drunk's last line in the movie; the rope trick is probably supposed to reflect this ambiguity despite being Mrs Loren's trickery.