Unstoppable
With great speed you tackle the guy with the gun, In your mind you think your beating him. However the impact of the attck caused him to fire the gun, killing the innocent man. What's worse is the force of your attack caused the guy with the gun to hit his head on the ground killing him instantly. You are mortified. A group of onlookers notice the bloody corpses of the two men with you standing above them. In a panic you flee the crime scene. Rumors spread about the person with superhuman powers who killed two innocent men. With the guilt weighing on your shoulders you vow never to use your powers ever again.