Which technique must never be applied with direct boney structure unless deadly force is justified?

The Brachial Stun technique is a striking technique that targets the brachial plexus, which is a network of nerves that can be found near the shoulder. When executed correctly, it can incapacitate an assailant momentarily by causing significant pain and disorientation. However, this technique must be applied with caution, particularly concerning direct boney structures such as the head, neck, or upper spine.

Applying this technique to direct boney structures could lead to severe injury or death, especially if the force is excessive or if the assailant's condition is unknown. The inherent risk when utilizing this method emphasizes the importance of controlling its application and ensuring that the use of force is justified, particularly in life-threatening situations. Understanding the technique's limitations and appropriate application is critical to practicing defensive tactics responsibly and ethically.