It's good to offer to help someone moving heavy boxes.
Jon's friend called him to help him move heavy boxes to his new apartment.
Jon wants to order a pizza.
Jon says he will help his friend if they can get pizza to eat after.
Jon tells his friend he is too busy and goes out to eat pizza.
Jon's friend pays for the pizza to show he was thankful.
Jon's friend doesn't talk to him for three weeks because he didn't help.