It's wrong to bully someone.
Terrence is in the school cafeteria and doesn't have money to buy lunch, but see's that his classmate Jeremy has a whole tray.
Terrence wants to eat Jeremy's food.
Terrence asks Jeremy if he would mind sharing some food with him, so he gives him half.
Terrence walks up to Jeremy and says he will beat him up unless he gives up his food, so Jeremy hands it over.
Jeremy feels good about himself for helping his fellow classmate.
Jeremy feels sad and angry, and now has nothing to eat.