The champion of the ADCC 2003 absolute division and ADCC 2011 under-99 kg division who formerly fought in the UFC, Dean Lister recently taught an instructive and upbeat seminar in Paris, France.
The limber and scholarly fighter shared his arsenal of techniques, such as his lethal heelhooks, with the students.
Note how he places a foot below the leg that is not being attacked. This keeps his opponent from rolling out.
Also worth checking out, at minute 3:30, Lister teaches a slick double attack, for when opponent tries defending his foot by grabbing behind the neck.