Sometimes there are some freaky knife, threats, and knife attacks that need special self-defense. You can figure them out or we can help you. This is one of them. Add them to your fighting system whether it be MMA, BJJ, karate, martialarts, Taekwondo, kungfu, Aikido , KravMaga, or military and law-enforcement specialties. SUBSCRIBE, click the link in the bio, and go to learndefense.com now! 
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Was für ein Schwachsinn
Maybe I come pay you a visit , help you
Bullshido
What happens if they actually do anything at all whatsoever besides standing there like a dummy? This Is just ridiculous
Give him your money
No !
Never trust a guy that never use it in a real fight or ever got in a street fight
Never trust a guy teaching martial arts in jeans
No