Self-defense against a knife is an advanced technique. In order to do this, you have to understand that you have to close the gap and take away space. Also, in your first move, you have to cancel any of his backup weapons. This takes quite a bit of training. We can help. Add this to your BJJ, MMA, kungfu, Karate, Aikido, KravMaga, military, and law-enforcement specialties. SUBSCRIBE , click the link in the bio, and go to learndefense.com NOW.