This clip starts where Part 3 ended. It's getting late, and I need to wrap things up, so I tighten the zipties pulling Carissa's arms up, which stresses her shoulders and increases the pressure on her cunt just a little more. Then I add a ziptie between her wrists and the back of the horse, and then another from her chest harness to the front of the horse. Carissa is staying put and there is no room for her to make any adjustments. It's fun to watch her try though. You can see her frustration as she gags, moans, sweats, and twitches as she tries to find a new position to ease her discomfort, but her attempts are nothing but a futile struggle. After a while, the lights go out and the door slams closed. I'll check on her later... hopefully she treats this horse better than her last one. At the end of the clip, I added some behind the scenes footage.