Let's say Bob is really cranky for some reason or another. Maybe someone's ruining his life and eating all his steak and it's really getting to him. If he just grumbled and steamed about it, we would be able to just conclude that Bob is in a bad mood. However, Bob has just done something nasty to someone else. Maybe he's yelled at his best friend Alice, or else he's smacked Charlie in the face. In extreme cases, he killed Kenny. Whatever Bob has done, his bad mood was a factor in it and he uses it as an excuse for his actions. Examples of Bad Mood As an Excuse include: