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.
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Mistakes
When Satan enters the church demanding to know where Christine York is, one of the priests approaches him with a crucifix. The camera is facing the priest, Satan grabs the crucifix and stabs the priest right in the centre of his forehead (just above the eyebrow line). The camera angle changes to facing Satan and when the priest hits the deck, the crucifix is sticking out of his head higher up and above his left eyebrow. See more...
Trivia
The scene where Arnie is loading up at Stinger's HQ with all the weapons is very reminiscent of a similar scene in another Arnie movie, "Commando", with the pulling of buckles and tightening of belts etc. See more...
End of Days (1999)
Directed by Peter Hyams, starring Arnold Schwarzenegger, Gabriel Byrne, Kevin Pollak, Miriam Margolyes, Robin Tunney (add more)
End of Days mistakes
Continuity: After the priest writes down 666 on a piece of paper, he holds it upside down to reveal that it is 999. When we cut back to him a few seconds later, the numbers look completely different.
Factual error: As the subway trains are disconnecting, Arnold fires a 203 grenade launcher at Satan, knocking him back onto the other train. A 40mm grenade doesn't arm itself until about 15-25 meters, so unless Satan jumped extremely far, the round would not have detonated.
End of Days trivia
At one stage, Satan walks past an ice rink in New York City. Over loudspeakers, we hear the song, 'Tidings of Comfort and Joy'. Satan smiles, then walks away, before the words, "Christ our saviour" can be heard.
The scene where Arnie is loading up at Stinger's HQ with all the weapons is very reminiscent of a similar scene in another Arnie movie, "Commando", with the pulling of buckles and tightening of belts etc.