For that very morning, Ron had broken Hermione's arm and dislocated her shoulder. He had tried to stop her from going to the Deathday party, twisting her wrist ... causing it to snap ... then tearing her shoulder from its socket as she tried to break free from his grip. She was in excruciating agony, but she wouldn't fail to host the Deathday Party for anything. So she'd gritted her teeth, fashioned a makeshift sling from a tablecloth, and bore the pain as best she could.