Return of the Magnificent Seven (1966)

Revealing mistake: In the last scene, when Chris is leaving, it shows several shots of the peaceful village. Each time they show the village, in the middle of the square is what looks like two boys fighting. One punches the other and he falls down and gets up and punches back and he falls down. They do that about three times.

Vin: I came after you so that you'd know there was a price on your head.
Chris: How much?
Vin: Five hundred.
Chris: Dollars?
Vin: Pesos.

Vin: I heard you were riding shotgun for the Overland Stage.
Chris: I was. My doctor told me to quit. For my health.
Vin: Why?
Chris: Too much lead in the air.