Bite the Bullet (1975)

Continuity mistake: Near the end, Sam Clayton is nearing the finish. The audio leads you to believe that the horse is breathing VERY hard, but when the camera shows the horse, the nostrils are NOT flared as they would be on a horse that has been run to exhaustion (or even down the block). Also, the people filming this scene obviously have no clue about the nature of sweating in horses. They showed "lather" all through the horse's mane. The ONLY places horses will lather while sweating is where something is rubbing, i.e. underneath the saddle, the bridle or breast collar, where the reins rub on the neck or between their back legs.

Mister: God, what ain't I tried. Pony express rider, Overland Stage driver, lawman, gambler, riverman, rancher, rodeo hand, barman, spittoon man... old man. Never much to remember. Of course, there ain't much to forget, either. Nobody's got much use for an old man. I can't blame 'em much. That's why I'm going to win this here newspaper race. When I cross the finish line, I get to be a big man. Top man. A man to remember.