Demonstrating a martial arts defense against a headlock with knife. Learn self-defense with martial arts in this free video. Expert: Jason Jeannette Bio: Jason Jeannette is a Third Degree Black Belt who has extensive training in Krav Maga, Modern Arnis, and Brazilian Jiu Jitsu. He is the co-founder of a Modern Mixed Martial Arts System, EM3. Filmmaker: Dimitri LaBarge