"You – you can’t defend yourself," she gasped. Without his wand in hand Draco couldn’t block, couldn’t attack – he had promised not to risk himself for her. Hermione’s hand was wrapped around her wand, but she felt all muzzy-headed, couldn’t think of...spells. Draco yanked at her  trying to get Hermione to move faster, and she yelped with pain and he flinched.