She went on breaking pea pods into the pot. "But now you take that Jack," she said. "You know him. He's the boy with the brown hair and the freckles. Well, he's the biggest boy in our school, and yet I happen to know personally from Maisie, his sister, that he'd rather die than let anyone know he was afraid of being hit in the nose, 'cause he's scared of the sight of blood – especially his." (8.84)
Robin dispels Moon Shadow's fear of Jack by showing that most people, including Jack, are afraid of something.