Revealing mistakes: Near the end of the film, Rampion fires a pistol into the air to warn a train engineer that his train, loaded with evacuees, is unknowingly headed for the huge approaching crack erupting in the earth's surface. But it would have been impossible for the engineer to hear the pistol shots over the very loud noises of the train and the exploding earth around it. Also, Rampion is located far from the train, making it very unlikely that the engineer could see him.
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