Some of these pictures and descriptions may give away plot details that you might not want to know before watching the film.
This is the fourth movie in the popular franchise about everybody's favorite tomb-raider - the archeologist who who goes to great trouble to find great historical treasures then destroys most of them - Indiana Jones (Harrison Ford.) In this movie Jones and friends destroy an entire lost city in the Amazon built by giant crystal inter-demensional aliens in a flying saucer. And that's not even the craziest thing in this movie - that would be when Indy "nukes the fridge," surviving a nuclear bomb blast inside a refrigerator that is exploded out of the blast zone.
The snake scene is not very sane, either. For a movie set partly in the Amazon jungle, there is an unfortunate lack of snakes. We see only one, and it is used in a comic scene that once again makes fun of the fact that Indiana Jones is notoriously afraid of snakes.
As they run away from the Russians who are the villains in this script, Jones and his baby mama Marion (Karen Allen) fall into a dry sand pit that traps them, pulling them under. Marion's son Mutt (Shia LaBeouf) runs to find something to use to pull them out and returns with a large snake. He pulls his mother out with it, but Indy is scared of snakes so he won't touch it. Mutt tells him it's a rat snake, but Indy knows rat snakes are not that large. Then Mutt tells him it's not poisonous, but Indy won't grab it until Mutt tells him it's a rope. After he is pulled out, Indy tells him to get rid of it so Mutt throws it into the jungle, telling him he's a crazy old man for being afraid of snakes. I don't know if that's crazy, but I do know that Mutt is a psychopath for throwing a live snake instad of just putting it down and letting it crawl away.
The snake Shia LaBeouf holds in the movie is a real live snake, some kind of python is my guess, but when we see Ford grabbing the snake and being pulled out, it has been replaced with a fake snake. Because a real snake would be torn into a bloody mess if it was used as a tow rope. The snake that is thrown away is also a fake.