Fun fact: George Lucas named the character Indiana after his dog, an Alaskan malamute that he owned in the 1970s. Indiana (the dog, not the Jones) also served as the inspiration for Chewbacca in the Star Wars movies. (source)

Movie buffs know that the entire crew of Raiders got deathly ill from the food they ate in Tunisia… all except Steven Spielberg, who brought in crates of Spaghetti-Os on his own dime and ate them instead of the local cuisine. Everybody else won a free case of the trots with their stay, and it actually led to one of the movie's most famous moments. Harrison Ford was supposed to have a lengthy fight with an Arabian swordsman in the middle of the Cairo streets. But, green in the gills and struggling to stand, he didn't feel up to a long fight. So he said, "Why don't I just pull out my gun and shoot him?" Which turned out to be way better than any lengthy throwdown they might have planned. (source)

The film's sound designer was pretty ingenious. He ran his fingers through a cheese casserole to get the sound of snakes slithering around. (Admit it, you've done it.) The sound of the Ark being lifted was him lifting the toilet seat at his house. And the sound of that giant boulder chasing Indy? It was a definitely more mundane Honda Civic going down a gravel-covered hill. Did they not cut the sound designer in on the $18 million budget? (source)

Wondering how to get up close and personal with the face-melting scene? Your wait is over. (source)