During a recent visit to the Fredericksburg Moy Tung Ving Tsun Kung Fu branch school, the Grandmaster went over about 8 different ways to hold and train the ankle, variations of relaxing and curling it.
The full informal ten minute video, and other informal videos featuring Grandmaster Moy Tung teaching, are available to Kung Fu Fxbg and Moy Tung inner circle students.