Self-Defense - TaeKwonDo - Rear Horse Kick
Human Weapon: This video tutorial shows you how to do a Rear Horse Kick Technique

Self-Defense - MMA - The Sprawl
Human Weapon: this video tutorial shows you how to do The Sprawl trick. It is defensive technique that is done in response to certain takedown attempts.

Self-Defense - Pankration - Achilles Leg Lock
Human weapon: This video tutorial shows you how to do an Achilles Leg Lock, from Pankration. An achilles lock (also called an achilles hold or achilles squeeze) is a compression lock that involves pressing the achilles tendon into the back of the ankle or lower leg.