He was blooded. The soldier didn't. A bullet had sprung from the gun and struck the soldier down. Looking back that night he figured out what happened. The brain is a cluster of nerves.
Nerves react to stimuli, the soldier turning.
The signal reaches the brain, the eye sees clearly, the hand is steady and pulls the trigger, the enemy is vanquished. Reflex makes the decision for you. What's wrong with me. The man felt something. A whisper reaching out to him, calling.