Sorcerer (1977)

Directed by William Friedkin

Four men from different parts of the globe, all hiding from their pasts in the same remote South American town, agree to risk their lives transporting several cases of dynamite (which is so old that it is dripping unstable nitroglycerin) across dangerous jungle terrain.

Although each individual sequence [in the prologue] is economical, placing four of them back-to-back at the beginning of the movie is like starting a journey with a long trip through customs.

Sam Adams (The Dissolve)