It's not okay to hurt people physically.
Jack sees a fight break out between people at the park and stops to see what is happening.
Jack wants to prevent anyone from getting injured.
Jack steps between the people fighting and suggests they talk it out.
Jack pulls one person off the other and punches of the people in the face.
Jack manages to calm the people down, and they thank him for stepping in and stopping the fight.
Witnesses see Jack hitting the person, and he gets arrested for assault.