Self-Defense Sambo - Side kick
Human Weapon video tutorial: The Side Kick refers to a kick that is delivered sideways in relation to the body of the person kicking.

Self-Defense Kung Fu - Sanda Takedown
Human Weapon: This video tutorial teaches you the Sanda Takedown trick.

Self-Defense - MMA - Double Leg Takedown
Human Weapon video tutorial: The double leg takedown (colloquially simply known as a double leg or even double) involves grabbing the opponent with both arms around the opponent's legs while keeping the chest close to the opponent, and using this position to force the opponent to the ground.