Factual error: The priest says that St. John saw the number 666 in his vision, but it was actually 999 inverted. I'm not sure, but I don't believe St. John read modern Arabic numerals like we do. Didn't he read Roman numerals? I think if St. John saw the number 666, it would actually be DCLXVI. (01:05:40)
Factual error: Arnold's wife and daughter are shot once each. There should not be blood on all four walls of the room.