In the scene where Kitty and Festus are on horseback with nooses around their necks. Matt comes in shooting and spooks the horses. The horse Festus was on backed up a little to far. If you watch close you will see Festus reach up and grab the rope around his neck when his hands were supposed to be tied. The next scene his hands are still tied. I figure the rope got a little tight around Kens neck and his hand naturally grabbed the rope.