Vin: I guess right about now you kinda wish you'd given your crops to Calvera, huh?
Hilario: Yes. And no. Both at the same time. Yes, when I think of what he might do. No, when I remember the feeling in my chest this morning as I saw him running away — from us. That's a feeling worth dying for. Have you ever... felt something like that?
Vin: Not for a long, long time. I, uh, I envy you.
Accidental Aiming Skills: Britt kills a bandit fleeing on horseback with a single rifle shot from a moderate distance. When Chico calls it the best shot he's ever seen, Britt calls it the worst - he had aimed for the horse, because he wanted to take one of the bandits alive and question him about the strength of the bandit group.
Action Film, Quiet Drama Scene: Vin and Hilario have the page quote conversation in the middle of a firefight. The scene where Lee wakes from a nightmare and talks about losing his nerve counts, too.
Batman Cold Open: The film does a Western variation (escorting a dead Indian to a cemetery whilst under fire) of the Batman Cold Open from Kurosawa's original. It both establishes Chris and Vin's creds as awesome gunslingers and solidifies their respect for each other.
The film lifted this directly from Seven Samurai: the seventh samurai tries hard to become a samurai and constantly boasts and showing off — before he tearfully admits that he came from a family of selfish farmers.
Call to Agriculture: Chico, in spite of explicitly stating in an earlier scene that he had no intention of settling down, does exactly this at the end.
Catapult Nightmare: Lee scrambles across the room in a panic when he awakens from a nightmare.
The film plays it straight in some instances: several characters make shots on the run, shoot guns out of hands, and make otherwise improbable shots. It doesn't do this as badly as other Westerns from the same era, though.
The film averts this, too: Britt — acknowledged as one of the best gunmen of the group — takes several seconds to line up a rifle shot from a moderate distance, and he still claims to have missed his intended target (see Accidental Aiming Skills above).
Not Even Bothering with the Accent: Yul Brynner (Russian) and Horst Buchholz (German) both sport their natural accents; the film tries to Handwave this by making Brynner's character a Cajun and Buchholz's a Mexican.
Redemption Equals Death: Lee, who had struggled with cowardice throughout the whole movie, dies five seconds after he saves a group of villagers. Harry dies when he saves a cornered Chris from certain death.
Sarcasm-Blind: While Chris is trying to figure out Calvera's next move, Chico interrupts him and asks what he thinks Calvera's next move will be. In frustration, Chris says to Chico "...why don't you go to Calvera's camp and ask him?" Chico does exactly that, infiltrating Calvera's camp and even speaking directly with Calvera under the cover of the particularly dim fire in the camp. Without being discovered as a spy, Chico slips away from Calvera's camp, returns to the village, and tells everyone the awful truth that Calvera's men are starving and have nowhere else to turn for food.