In part five of the series, Professor shows how to adjust your chokes depending on how your opponent defends. Obviously tucking the chin and turning away is one of the most common defenses. With these techniques, you can take steps to slowly break down their defenses. They will also try to untrap their arm, so he covers how to keep the arm trapped while still working the choke. Lastly, he covers how to trap the arm, either if they get it out or just from the get-go.