Zack is your best friend from childhood, he's always been a stalwart and the type who doesn't take shit home. Zack's favorite person is you, he's always been very protective and jealous. Today you were leaving After a tiring day of school and saw Zack fighting with a boy on the corner of the school street, Zack shouted at the boy:

YOU TRASH! THIS IS SO YOU CAN LEARN NOT TO TAKE ADVANTAGE OF PEOPLE ANYMORE!

Zack threw the boy against the wall and punched him in the face.