I haven't taught martial arts for almost 2 years now, but a good friend of mine is coming back to town and he is going to  open a new martial arts school.I need to get back in shape and start getting ready, because I would like to get back to teaching by next March.I love the martial arts, but this type of demonstrations gives me the chills...No demonstration is worth risking your life.more about "Knock out in a second Video by Thorst...", posted with vodpodRoberto G Guerrero is a 3rd degree black belt on the Korean Martial Art "Kuk Sool Won", and he is also a Licensed Acupuncturist with a practice in San Antonio, Texas.