Shooting Long Herd, also known as Wild Bunch, was exciting but exhausting. Horses just don't like to run down into an enclosed area, and to create this shot, Clasen asked the cowhands to gather the herd to the left and then stampede them down the hill in front of him. On the first two tries, they escaped up the steep embankment in the background. Before the third run through, which the photographer knew was his last attempt - the herd just wouldn't do it again - he placed several riders up on the embankment. As the herd stampeded, they wouldn't run into the cowhands on the hill so they "had" to run where Clasen had set up his shot. Victory! At last. One of his finest shots!