Professor Lucas Lepri demonstrates a self-defense technique for controlling an attacker without using strikes. He starts by protecting his face and closing the distance, then secures a grip on the attacker's arm and waist. Lucas uses his elbow to pin the attacker's wrist and prevents them from throwing punches. He then steps in front of the opponent and executes the O-Goshi hip throw. Lucas maintains control on the ground by going to the knee on belly position.