Man tries to rob a woman in Brazil with a large knife and a fake gun. Little does he know, she was right in front of her son’s jiu-jitsu school. As the crowd gathered (no one did anything) she screamed the name of the BJJ instructor (black belt) who came running down with his peers, … Continue reading Man Tries to Rob a Woman With a Knife in Front of Jiu-Jitsu Academy. BJJ Black Belt Subdues Him.