Doctor Kickass - Heel hook: Difference between outside vs. inside ••••••••••••••••••••••• The heel hook submission works by locking down the thigh and rotating the shin. The ligaments of the knee are responsible
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Gracie Submission Essentials: Grandmaster and Master Secrets of Finishing a Fight (1) (Brazilian Jiu-Jitsu series): Gracie, Helio, Gracie, Royler, Peligro, Kid: 9781931229456: Amazon.com: Books
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