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In the scene when when the Red Sea goes together, if you look behind Pharaoh as his troops are being engulfed by the water notice in the background that there are two boulders floating in the water, not being pushed but floating lightly.
There is a scene where a dead Indian warrior is discovered. In this scene he is covered by a large flat piece of stone. When they pull away the stone you can see his chest rising and falling as the "dead" Indian breathes. Much easier to see when viewed in HD.
At the beginning of the big party sequence, there is a beautiful swooping crane shot that ends by tracking in on a big picture window. Unfortunately, the window is set in a deep frame on the side of which you can clearly see the shadow of the camera and camera operator.
The catapult on the battlements Jean uses to evict the castle guards is rather curious. First, there is neither a bow nor any torsion to 'power' the weapon, and secondly it just seems to cock itself, right after each shot. All that Jean does is pull the lever and none of her diminutive helpers stand by for any cocking work whenever the catapult arm is shown.
Krell doorways and equipment suggest they are short, wide and 2-3 times larger than a human. Yet the shuttle pod the Commander, Doctor and Morbius ride in is designed for human size beings.
The aliens request a meeting with Dr. Marvin on the shores of the Chesapeake Bay, near Washington DC. However, the shot of him driving along the shore line shows mountains in the background, which don't exist in Eastern Maryland.
When Luz is talking to Jet on the phone for the first time, from the front she's fiddling with the phone cord with her left hand. When it cuts to the reverse, however, her hand is flat on the desk.
In the last scene where the King is lying on his death bed, Anna enters with her hair in a plain bun with a frilly hat on her head. When she comes over to kneel by the king as he is dying, her bun is covered with a black snood, which magically appears even though she never left the room.
In the scene where James Stewart told Doris Day that he lied about the telephone call was from the hotel, Doris gets excited and James struggles with her on the bed. During that scene, you can see on the upper left corner a shadow of a microphone.
There is a "No Riders" sign that keeps appearing and disappearing on the window of the jeep, from one scene to another, fron shot to shot, throughout the entire film.
In the final shot, just as the credits are rolling, the British warships are sailing away with the sun setting behind them. In an earlier scene the radio commentator says that the sun is setting and a shot of the sun touching the surface of the sea is shown.