When Mobeetie rides into town, shooting his revolver into the air, he fires 12 shots without reloading. The gun he is using is a six-shooter; 12 shots is not possible.
Although it's a sweltering summer day with a character even fainting from heat exhaustion, steam can be seen coming from a young boy's mouth when he warns an outlaw that a train's boxcar filled with dynamite could explode in Cimarron.