In the first shootout scene in the film, Joe managed to kill three opponents, but the gun was not aimed at them.
In a panoramic shot, the photographer captured the remains of Tabernas Castle, which shows that the film was shot in Andalucia, Spain, not the border between the United States and Mexico as described in the film.
After the first shootout of the film was over, the posture of the "corpse" on the far right changed several times.
When Clint was preparing his body armor, he was filing metal plates, but the sound in the film did not match his movements.
Clint walked into a small room with five opponents. After four gunshots, all five of them were shot and killed.
When Clint showed off his marksmanship at the reception, several holes had been dug in the armor.
When Clint entered the town, the hotel owner and the town bully said that he was riding a mule, but in fact, it was a horse.
In the scene where the soldiers were attacked, all the soldiers were "killed" twice, but from different angles.
When Clint went to rescue the mother, he rode a brown horse. When he came back, Clint's mount turned into a chestnut horse. In the daytime, the horse turned red.
When a small town bandit ambushes the army, it uses a machine gun that continuously fires bullets. This machine gun requires a bullet conveyor belt to be used normally, but this prop does not appear in the movie.
