Quite a number of people, including several Native Americans on horseback, are shot and killed on screen. No blood, but we see them fall off their horses.
A man falls off a moving train and down a steep cliff to his death, hitting several rocks on the way down. The scene was obviously shot with a dummy. No blood, but we do briefly hear him scream as he falls.
A man is tied to a chair and strapped to the side of a locomotive against his will. He is released later. Like much of the milder violence in this film, the scene is played for laughs.
A woman threatens to injure a man with a knife. We later see him walking with a limp and a cane. The actual injury is not seen, and the scene is played for laughs.