When Roy Wiley begins driving his small herd of cattle three men on horseback coming in the other direction begin firing their guns to turn the cattle back in the direction of Wiley who had been trailing the herd. The cameras pan back to a startled Wiley on horseback. As they do a man is seen walking in the woods in the background clearly observing what is happening.
In the early stampede scene where the rancher is injured, someone can be seen walking with a large pole or walking stick in the background, from left to right, behind the bushes. He is wearing a hat and he disappears out of the right side of the frame. He is either a member of the crew or else a hiker that happened to wander into the shot. But he is not easy to spot, so they may not have noticed him during filming.