Continuity mistake: When the guy at the start who betrayed Indy is shown stabbed by many spears, in the shot when Indy says "adios", he stays with him the entire shot. However, in the next shot, he's far away from him.
Continuity mistake: When seen from the outside the entry hole to the Map Room is quite vertical. The angle is different when seen from the inside. Further, the hole is so vertical that the sun wouldn't be high enough to shin through the hole at 9 am.
Continuity mistake: After the door to the Well of Souls is opened, Indy and Sallah take a sneak peek at the inside, immediately after, from a new angle, Indy sneaks in again.
Continuity mistake: The position of the dead monkey and the date next to him changes between the first and second angle.
Continuity mistake: The morning after Indy makes out with Marion, when he goes to check why the boat engines have stopped, the position of her hands, the wrinkles on the blanket and the dress behind the bed change positions between angles.
Continuity mistake: Indy walks to the hill where the ark is, holding a shovel that keeps facing different directions depending on the camera angle. Also, Indy holds it either by its black metal part or by the wooden stick. This all changes back and forth.
Continuity mistake: In the map room, Indy places his brush facing a 9 o'clock direction. A frame later it faces a 6 o'clock.
Continuity mistake: In the map room, Indy brushes the sand off of a stone, leaving a clean horizontal trail. A frame later, in the close-up, the upper left part above the trail is suddenly clean.
Continuity mistake: When Belloq traps Indy in the Well of Souls the sky keeps swapping between a dim yellow dawn sky, and a brilliant morning blue sky.
Continuity mistake: While Indy descends the Well of Souls the glowing logs underneath keep changing positions.
Continuity mistake: In the bar, the Nazi plays with the fireplace and threatens Marion, who takes a cigarette to her lips. A frame later, her hand is in a totally different position.
Continuity mistake: After the guy with the patch and the monkey greets the Nazis, Marion and Indy are seen walking through town, passing by an arched door. A frame later, from a different angle, they are passing by again and the amount of people around has increased.
Continuity mistake: In front of the idol, Indy shows Satipo the trap on the floor. Satipo's head position is different in all 3 shots in barely 2 seconds: First he's looking downwards, then straight, then his head is turned sideways, and then back to straight. (00:08:20)
Continuity mistake: The amount of moss behind the idol increases between shots.
Continuity mistake: In the marketplace standoff between Indy and his would-be attacker, in shots from behind Indy, he's facing one way, but in frontwards shots, he's facing a different way and when it cuts back to behind him, he's facing the other way again.
Answer: Indy and Marcus Brody believed that the Ark needed to be studied. They certainly didn't want to put it back where it was found. They believed that the U.S. government would find the best archaeologists, researchers, and scientists in the world to study the Ark. They are both upset that instead, the government has decided to simply lock the Ark away. This is why Indy says, "Fools. They don't know what they've got there," as he is leaving the building.
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