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When Charlie Allnut grabs a bottle of gin from the box, all the bottles in it are wrapped with paper for transport. But when Rose Sayer takes the bottles out of the box to empty them into the river, the paper is gone (from the movements of her hand/wrist, you can tell that she doesn't unwrap the paper from the bottles).
Towards the the end, when Scrooge wakes up in his bedroom on Christmas day and is elated to know he is still alive, he goes over and looks in the mirror twice. Both times you can see someone in the mirror reflection in the background, possibly holding a script.
In the flashback scene where Dustin Hoffman is in the hotel bathroom on the floor, he puts a coffee mug on the toilet, then the view switches and when it comes back the mug is gone, never to be seen again.
When British ship Lydia attacks 4 French ships in a Spanish harbour, the first lt. (Mr Bush) is injured in the LEFT leg. Later when they are being transported to Paris for trial, his RIGHT leg is injured
At the end of the film when all the women are dressed up after making clothes out of tablecloths, you can see the Spanish woman riding in the front of the wagon. The scene changes and she's riding on the side looking at all the men and smiling. The scene changes again and she's back to the front.
The scene where the murder comes into the dectective agency. Bud and Lou are talking to the murder and the description of the murder comes over the police radio, it states 5 feet 11 inches, weighs 165, blue eyes, brown hair last seen wearing a felt hat and dark borwn overcoat. Then 15 seconds later Bud says out loud and writing on a piece of paper description 5 feet 10 inches, weight 165, blue eyes, sandy hair.
When Capt. Hendry and Lt. Bob approach the green house door to confront The Thing after being alerted by the wounded scientist, you can clearly see the outline of the bullet holes in the door before it is opened and before Lt. Bob fires into the door .
John Wayne's squadron lands on Guadacanal as part of the "Cactus Air Force" in August 1942. However, they are flying F6F-3 Hellcats, which were not available, even to the Navy, until the middle of 1943. To top it off, they are painted in a late-war camouflage scheme with late-war markings.
Alice Tripp is wearing different shoes when she starts walking home from the movie with George Eastman than she is when they are close to where she lives.
In the scene when the Christians are being fed to the lions, we can see that when a lion "attacks" one of the men, the man is actually smiling and visibly playing with that wild animal.
When Bruno is on his way to Union Station, he's heading on a bridge away from the Lincoln Memorial, which means he's leaving Washington D.C. for Arlington, Virginia, or in other words, he's going the wrong way.
During the final dance number, Vera-Ellen's skirt alternates repeatedly between long and flowing and short and tight - perhaps to facilitate some of the dance moves.
Early on in the film Alec Guinness is travelling in the back of a van transporting gold bars to the bank. He spots what he believes is a suspicious car following and asks the driver to stop to check it out. The next shot shows the van stopping outside a row of buildings in a London street. The driver gets out to let Alec Guinness out of the van and they are now parked by a low wall with an open vista (probably one of the many bomb sites in London at the time) and no buildings.The next shot then shows the van outside the buildings again.
Several union soldiers wading across the waist-deep river (and later climbing out of the river) are carrying the U.S. Springfield Rifle, Model 1903, which is a bolt-action, magazine-fed rifle (Note especially the soldier who climbs out of the river holding his rifle above his head.) instead of the historical accurate muzzle loading rifle. The Model 1903 was adopted by the US Army in 1903 and used in World Wars I and II, but not the American Civil War. For a picture of the Model 1903 Springfield Rifle, see: http://www.army.mil/cmh-pg/Museums/Showcase/Myer/Myer-4h.htm.
Near the end of the film, Karl Malden is embracing Vivien Leigh. In one shot she has her left forearm against his chest, with her hand in the vicinity of his shoulder. In the next shot this arm is instantly around his neck.
There is a scene with Gene Kelly dancing at the top of the steps in Montmartre, opposite Sacre Coeur Basilica. In the background you see the lights of the Eiffel Tower. I have seen the view from the top of these steps, and the Eiffel Tower is not visible.