Throw rocks at things as you walk

You toss half fist sized rocks at fences and signs. Whack ping! You don't miss a throw. The acid seems to have dialed you into the right setting for doing things just right. You feel powerful and fast, a reflex ready to bend however it takes to go on. You pick up what you at first think is a rock and your holding a gun. A snub nosed black .38. You slide out the clip. Four bullets are inside it, hollow points. You shove the gun into your back pocket and you continue walking.