Thierry Delhief, international expert in Defense Professional, has a ten years of experience as operational leader in Group Intervention and Protection of Networks Paris. This paper presents techniques and defensive tactics to cope with the ingenuity of criminals, sometimes lethal and absolutely terrifying. Rings sharp, sharp phone cards or hidden weapons capable of propelling projectiles do that, now more than ever, security professionals should do big test preventive and defensive qualities. Realistic and effective formulas that always tend towards a single goal: safety.