It's wrong to hit people if it's not in defense.
Jeff is at the bar, and another guy bumps into him, spilling his drink.
Jeff wants to respond to the spilled drink.
Jeff realizes it was an accident, lets it go, and orders a new drink.
Jeff spins the guy around and punches him in the face.
The night moves on without being interrupted by drama, and Jeff is seen as nice and understanding.
The guy is hurt, a fight breaks out, and Jeff ends up spending the night in jail and getting a fine.