The following is a clip from the western The Good, The Bad and The Ugly directed by Sergio Leone, and in my opinion it is the greatest moment in the history of cinema.
For those of you who haven't seen the film, here's some context. Blondie (Clint Eastwood) and Tuco (Eli Wallach) are looking for gold that is buried in a grave. Tuco knows the name of the cemetery and Blondie knows the name on the grave stone, so they are unwillingly forced to work together. They find the graveyard, however Angel Eyes (Lee van Cleef), who is also looking for the gold, has managed to catch up with them. Blondie writes the name on the back of a rock and the three prepare to duel.
Essentially it's three blokes standing still for 5 minutes, but it's so expertly scored, directed, edited and acted that it has you on the edge of you're seat.
If you like the look of this clip, give the film a watch. Hell, go watch Sergio Leone's entire filmography, it's amazing.