Raiders of the Lost Ark was released on June 12, 1981 and Moviephone has a list of 30 Things You Might Not Know about the film. Here’s just a few:
Indy’s last name was almost Smith; it wasn’t changed to Jones until just a few days before filming.
The giant boulder was Steven Spielberg‘s idea and was supposedly based on a Scrooge McDuck cartoon.
The actor who plays Indy’s guide who tries to kill him in the jungle also plays the monkey keeper with the eye patch in Cairo.
Steven Spielberg was the only one who didn’t get sick on the location shoot; he refused to eat local food and ate only canned Spaghetti-O’s.
R2-D2 and C-3PO appear in hieroglyphics on the wall in the Well of Souls.
The sound of the heavy Ark lid being lifted was created by the sound guy lifting the lid of his toilet at home.
See the trailer: