Hermione made herself seem as small as possible in the corner away from the still barking Alfie. Every lesson she ever learned about projecting a steely mask of indifference on her face was thrown away. She allowed the very real fear she was experiencing to show on her face. She wanted the Muggle to know she was afraid. Yes, she was capable of killing the woman with hardly any effort, but she was still frightened that this would be another threat to her being able to walk out the door and run away for another day.