In 1936, archaeologist and adventurer Indiana Jones is hired by the U.S. government to find the Ark of the Covenant before the Nazis can obtain its awesome powers.
This movie opens with Indiana Jones (Harrison Ford) and Otto Octavius (Alfred Molina) wandering through a jungle. Somehow they stumble upon a cave. A cave of wonders I suppose. How did these ancient people build a boobytrap that is activated by someone blocking the sunlight? How does that work at night? Who comes along and makes sure all these pressure plate arrows haven’t gone bad?
Moving on, there is a golden head which Indy thinks he is going to trade with a bag of sand. I’m pretty sure he’d need something like 8 times as much sand as the volume of that head. Regardless that doesn’t explain why the trap sinks down for lighter sand. Indy then attends the school of Prometheus in ‘How to Run Away From Things’ as he flees a boulder.