Some of these pictures and descriptions may give away plot details that you might not want to know before watching the film.
Indiana Jones established early in this film that he is afraid of snakes, so when he has to rapel down into an ancient temple, guess what it's filled with? And not just one or two - we're supposed to believe that it's filled with snakes, that just happen to be hanging around there, like it's the world's biggest pet store, or like one of those horrible rattlesnake roundup pits full of snakes - a snake prison. "Snakes, why did it have to be snakes" is all he can say. Then a guy with a turban says "Asps, very dangerous. You go first." All sorts of fun ensues as Indy tries to barbecue the snakes and he and his girlfriend try to get out alive. Most of the "snakes" look fake, but they threw in a few live boa constrictors and others to fool you.
In the beginning sequence of the film, Indiana Jones is chased by South American Indians shooting arrows at him. He jumps into a getaway plane that takes off from a river. Just as it gets airborn, Jones is startled to see a large Burmese Python on his lap and yells to the pilot "There's a big snake in the plane, Doc!" who replies "Oh that's just my pet snake Reggie." (Pythons are not from South America. Later we see Boa Constrictors in Egypt, which is the species we should have seen in South America.) Then we get the classic soundbite "I hate snakes, Doc, I hate 'em!" This sets up one of the ongoing gags of the Indiana Jones franchise - Jones pulls off a very dangerous stunt fearlessly but gets frightened by little old snakes. The pilot tells him to show a little backbone. Cue the laugh track. With a setup like that, you know there will be more snakes in this movie, and there are. Just look above.