Goofs for
House on Haunted Hill (1959) More at IMDbPro »

• Continuity: The Cadillac funeral cars in procession at the beginning of the film are various model years. In the next scene when they pull up in front of the house they are all the same year.
  
  
• Revealing mistakes: As Annabelle is lowered after her hanging, the supporting rope is slack and obviously not bearing her weight.
  
  
• Continuity: When Annabelle gives Frederick her gun, he places it in the mini-coffin and closes the coffin. However, in one of the next shots, we see that all coffins are open.
  
  

• Continuity: Lance locks his door from the inside with a deadbolt after the Doctor calls everybody to the meeting, and leaves through Nora's door. When they return from the meeting he opens his own, unlocked, door from the outside.
  
  
• Crew or equipment visible: After Nora throws everyone out of her room and the others are talking in the hall, someone's hand comes into the shot in the lower left corner of the screen.
  
  
• Revealing mistakes: After Nora brings everyone to the cellar when Lance gets locked in the room you see Mr. Loren light a candle when he goes to enter, but the room itself lights up before he even enters the room.
  
  
• Continuity: After Lance pulls Nora out of the way of the falling chandelier his arm alternates back and forth, from being around her shoulders to being around her waist.
  
  
• Plot holes: After the guests have locked themselves in their rooms, Nora emerges, goes to the end the hall and discovers Annabelle swinging from a noose. Nora screams. She backs into a corner and is confronted with a monster hand and screams again. Next scene, the doctor knocks on Mr. Loren's door and asks him if he heard anything strange, to which Mr. Loren replies that he thought he heard footsteps. How did no one heard Nora screaming?
  
  
• Revealing mistakes: When using candles in the rooms in the basement, the candlelight is obviously a spotlight as the shadows of the candle and silhouette of the person are displayed on the wall, when all there should be is candlelight.
  
  
• Errors made by characters (possibly deliberate errors by the filmmakers): Frederick Loren announces at the start of the challenge that if any of the contestants die, their heirs will get their shares of $10,000 each. Later he says that if any of the contestants die, the money will be split evenly among the survivors.
  
  

• Miscellaneous: SPOILER: The skeleton emerges from the acid unscathed, yet Loren drops it back in in order to destroy the evidence of his crime.
  
  
• Plot holes: SPOILER: If the caretakers are real people, how can they stand in the doorway without saying a word and suddenly disappear? Also, how does the wife float in mid-air and teleport around the cellar? She doesn't react to a bloodcurdling scream right next to her - is she deaf as well as blind?
  
  

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