The Hook kick (in Korean, huryeo chagi or golcho chagi, in Japanese ushiro mawashi geri) strikes with the heel from the side (or flat of the foot in sparring). It is executed similar to a side kick. However, the kick is intentionally aimed slightly off target in the direction of the kicking foot’s toes.
At full extension, the knee is bent and the foot snapped to the side, impacting the target with the heel. In Taekwondo it is often used at the resulting miss of a short slide side kick to the head, but is considered a very high level technique in said circumstance. Practitioners of jeet kune do frequently use the term heel hook kick or sweep kick. It is known as Gancho in Capoeira.
[From Wikipedia. Original page is here]







