In a sudden attack, the rapid use of objects in the environment for defense requires calm judgment and efficient action. The following is a step-by-step practical guide： ###1. Environmental scanning and threat positioning (completed within 3 seconds) 1. **360-degree surround view**: Use residual light to quickly scan the ground and platforms within a radius of 5 meters, giving priority to hard, sharp or throwable objects -Example: Pay attention to the tableware area (dinner knife/wine bottle), fire fighting equipment (fire extinguisher/safety hammer) in the restaurant scene 2. **Threat channel judgment**: Identify the attacker's offensive path and select items with physical barrier function -Case study: During the attack on a shopping mall in Shenzhen in 2016, the security guard used a metal facade to build a temporary isolation zone. ###2. Hierarchical selection of weapon items (2-second decision-making) | Level | Item type | Attack Effectiveness | Defense effectiveness | Usage Points | |------|------------------|----------|----------|------------------------------| | S class | Metal stick / Fire Axe | ★★★★★ | ★★★★★ | Keep a safe distance and aim at the joints | | Class A | Folding Chair / Fire Extinguisher | ★★★★☆ | ★★★★★ | Keep Z-shaped movement when spraying fire extinguishers | / Grade B | Kettle / Glass Bottle | ★★★☆☆ | ★★☆☆☆ | Make a sound to attract attention and spill liquid | | Grade C| Books/ Backpack | ★★☆☆☆ | ★★★★☆ | Wrap your arms around to form a buffer to block sharp weapons | ###3. Tactical application skills 1. **Space manufacturing technique**: Use rotating office chairs to form a mobile barrier, and use metal stationery boxes to create evacuation windows. 2. **Chemical defense**: If the detergent is found to be spilled immediately, the mixture of 84 disinfectant + toilet cleaner can produce irritating chlorine gas (pay attention to your own protection) 3. **Sound and light interference**: The smart phone turns on the flash flashing mode and plays the sound of a siren to deter the attacker. ###4. Risk control principles 1. **Legal red line**: The intensity of defense must be equal to the degree of infringement, and avoid the use of knives and other appliances that may be identified as active attacks. 2. **Ergonomic**: Keep a grip distance of 30cm when grasping the broom, which can not only increase the torque but also prevent the weapon from being captured. 3. **Escape route**: Plan the retreat route simultaneously when selecting items to ensure that the 3-meter passage behind you is unblocked. ###5. Daily preparation list -Portable EDC (carry equipment every day): tactical pen (with broken window head), mini glare flashlight -Environmental dynamic line memory: Every time you enter a new place, subconsciously confirm the location of 3 potential defensive items Important reminder: In 90% of sudden attacks, it is safer to evacuate in time than to fight on the spot. It is recommended to give priority to the use of items to create obstacles to buy escape time, and not to conflict head-on if necessary. Regular participation in scenario simulation training can improve emergency response capabilities.