Note: In this scene from Mel Gibson's fantastic movie, Apocalypto, Mayan priests are conducting human sacrifices in an attempt to appease the gods during a time of disease and bad harvests. That's the official line, anyway. In reality, the priests and ruling elites are only concerned with protecting their wealth and status and keeping their subjects in line.
Fully aware that a total eclipse of the sun is about to take place, they use the eclipse to demonstrate their power and reinforce their authority over the masses, a classic example (though fictionalized) of the use of religious propaganda in the ancient world. The priest's cynical laughter at the end of the scene tells the story.
Apocalypto is an incredible movie: a classic thriller and an epic adventure story set against the background of a decaying MesoAmerican civilization. It's brutal, bloody and absolutely mesmerizing. Highly recommended.