            "Sirius!" Hermione whipped out her wand. A spell was on the tip of her tongue, before she hesitated—if she engaged him like that, he might set off his volatile magic and set the aurors on them. Crying out in frustration, Hermione threw her wand to the side and flung herself over Sirius’s back, arms wrapped tight around his chest. "Sirius, stop it!" she screamed, trying to haul him back. Lucius’s face was bright purple, mouth gasping for air that wouldn’t come. "Sirius, you’ll call the aurors!"