1. In the infamous shot with Indy pitted against the flamboyant swordsman, Indy was originally supposed to disarm him using his whip...
Unfortunately, due to a bout of food poisoning affecting Ford and the entire crew, he was unable to perform the stunt.
2. Spielberg's second choice for the role of Indiana was Tom Selleck. Thank goodness Harrison Ford was his first!
3. During the Well of Souls scene, ironically, one of the pythons died after being bitten by one of the cobras.
4. The spirit effects at the climactic ark ceremony were achieved by filming mannequins in slow motion and through a fuzzy lens, all underwater, to exude an ethereal quality.
5. The monkey saluting with his paw and saying "Heil Hitler" was thought up by George Lucas and happens to be one of Spielberg's favorite scenes.
6. John Williams wrote two themes for the film. Spielberg loved them so much, he suggested that Williams use both of them.
7. George Lucas first dreamed up the idea of an adventurous archaeologist around the same time he envisioned the Flash Gordon-type space story which became Star Wars: Episode IV - A New Hope.
8. The opening scene in the lost South American temple is partly based on a classic Disney Ducks adventure.
9. The giant boulder that almost crushes Indiana Jones at the start of the film was made of fiberglass.
10. The unmanned airplane actually ran over Ford's knee, tearing his ligaments. Rather than submit to Tunisian health care, Ford had his knee wrapped in ice and carried on.
11. After a rusty looking ship that was perfect for the Bantu Wind was found, it was, without the crew's knowledge, repainted and looked pristine when it came time for filming
12. The sound of moving the lid of a toilet cistern was used to create the illusion of the heavy lid of the Ark being slid open.
13. The original name of the lead character in the script was Indiana Smith. Luckily, his name was changed to Jones on the first day of production.
14. Indy's line to Marion when they are on the ship - "It's not the years, honey, it's the mileage" - was ad-libbed by Harrison Ford.
15. You can clearly see a fly creep into the mouth of Paul Freeman during the scene where Indiana threatens the Nazis with bazooka.
16. The rope bridge used during the fight scene was actually suspended a couple of hundred feet over a gorge on location in Sri Lanka.
17. Kate Capshaw was covered with over 2,000 bugs for the chamber sequence.
18. The "chilled monkey-brains" were made from custard and raspberry sauce.
19. Kate Capshaw was thrilled at the opportunity of singing and dancing in the opening musical number, but unfortunately her dress was so tight, there was very she could attempt without ripping it.
20. The huge mineshaft was a circular construction around the largest soundstage. To make it look different, they just altered the lighting every time the carts completed a loop.
21. For the scene at the Nazi rally in Berlin, Spielberg had all the extras who did the "Sieg Heil" arm salute also put their other arms behind their backs and cross their fingers.
22. Sean Connery and Harrison Ford wore no trousers during the shooting of the entire Zeppelin sequence.
23. Sean Connery was always Steven Spielberg's first choice to play Indiana Jones's father, as an inside joke to say that James Bond is the father of Indiana Jones.
24. Most of the uniforms worn by the Nazis in the Berlin book burning scene are authentic WW2 uniforms and not costumes.
25. When shooting in Venice, they were allowed to have complete control of the Grand Canal from 7am to 1pm for one day.
26. Two thousand rats were bred for the production.
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