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.

Self-Defense Marine Martial Arts - Round Kick Defense
Human Weapon :

Self-Defense - Karate Punch Blocking "Uchi Uke"
Human Weapon: This video tutorial shows you how to do a Karate Style Punch Block, This Move is called the ' Uchi Uke ' (outside mid-level block)