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.
Great sites
Mistakes
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. See more...
House on Haunted Hill mistakes
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.
Continuity: Frederick picks up a bottle of champagne out of the ice bucket and shakes it a little. As he does this the foil and wire are still on top. He turns and aims the bottle at his wife, then tips it back and the foil has vanished as he now just removes the wire and cork.