The Soldier's Twitch

You walk with your weight carried on the outsides of your feet. It's characteristic of someone who walks long distances over rough ground, but not quickly. You out your right hand in your jacket pocket, but not your left, as if the posture of right hand higher and left hand lower feels natural to you; the posture of someone carrying a rifle at half-ready. You scan visually from side to side on the street; you notice rubbish bins, parked cars, and on-coming pedestrians, but someone overtaking from behind doesn't bother you. You're used to working with people you trust in an otherwise hostile environment.
You need to calm down. You're not fighting a war.

It's okay to give peace a chance.