Best part is a scene that happens before the cage and but plug scene. Charlotte Vale is pretty much standing to attention and is being asked questions and humiliated. The sexy body just standing there and being very submissive was a good scene.
There a part where she crawl form the floor into the cage with a dildo in her mouth, must have very humiliating for her, a very erotic scene.
Best scene has to be when Charlotte is in the cage and gets zapped with electric rod. She cant get away and presses herself into a corner, trying (to no A-vale, pun intended) to get away.
Her effort is futile and the instructors really stretch out this moment. And tease her a lot before they actually zap her. The ass hook sex scene was also very good.