Why is moving offline upon the identification of a firearm threat the initial response?

Moving offline upon identification of a firearm threat is the initial response because it immediately reduces the probability of being hit by the first shot. Firearms are designed to project projectiles along a linear path, and moving to the side disrupts this path, making it more difficult for the attacker to accurately target you. This initial movement provides crucial milliseconds to assess the situation, seek cover, or plan a counter-attack. Remaining stationary makes you an easy target, while even a small lateral movement can significantly increase your chances of survival. For instance, if an attacker is aiming at your center mass, stepping to the left or right creates a new angle, forcing the attacker to reacquire their target and potentially missing their initial shot. This action buys time and introduces uncertainty into the attacker's plan, increasing your opportunity to respond effectively.