Craig demonstrates how to use the bicep tie to drive the opponent's limb away from you. This is a responsive action to a free swinging knife in a clinch. The wrist tie is also useful in controlling the opponent's limb.
Craig demonstrates the underhook arm tie as the best way to resolve a clinch. It allows for several options as transitions in position. Plan A is to get behind someone. Plan B is to do the hook and tie combination.