Silly observation. I was watching an old western flick, in color, so not as far back as black and white. The "hero" decided to ride a horse that doesn't want to be ridden. I know that some rodeo horses are natural buckers and love it. The scene used at least 2 different horses and possibly 3 or 4. The horse was required to do some dangerous stunts, like going over a rail and running into walls and bucking through a china shop. Then I noticed the one thing that made my eyes roll almost out of my head. Hey! Cowboy! The horse will stop bucking if you take off the bucking strap. Couldn't bring myself to watch any of the rest of the movie.