It's hurtful to yell at a friend.
Andy is running late and stops by Penny's house to pick her up.
Penny wants to get to school.
Penny tells Andy they should have time to make it to school and thanks him for the ride.
Penny gets into Andy's car and begins screaming at him for being late as he drives to the school.
Andy knows Penny is grateful for the ride and tries to be on time the next day.
Andy thinks Penny is an ungrateful friend and never picks her up again.