When Flagg and McKay are running along the roof of the train, the view from inside the train shows their shadows on the cliff wall beside the tracks level with their actual position on the roof, as though the sun were nearly on the horizon throwing their shadow straight onto the cliff wall directly behind them. But when the view switches to overhead on top of the train, their shadows are directly below them as though the sun were directly overhead. This same pattern is repeated several times, camera overhead showing their shadow directly below them, then inside showing their shadows on the cliff wall out to the side.