What to do facing the most frequent empty-hand attacks in the street? Police from countries as different as Spain, Brazil, or the United States coincide up to 90% in the five most common techniques of empty-hand aggression: the circular punch, the front kick, the head-butt, grabbing from behind, and the neck-hold. In this first video of the series, 5 experts of distinct styles, all of them involved in security forces, respond to this question. Jim Wagner (Reality Based Self Defense), Avi Nardia (Kapap), Victor Guiterrez (WingTsun), J.L. Isidro Casas (Aikido), and Salvatore Oliva (Professional Fighting System) confront these five situations one by one with universal solutions that all of you can put into practice.