Surprised by his sudden movement, Hermione took a quick step back and stared at Draco a moment. Looking from him to his wand, which was now directed at her for no apparent reason, instinctively she withdrew her own wand and pointed it right back at him, wary now.
"What hell is wrong with you?" she bit out, looking at him as if he was crazy. "I asked you a question." Maybe there was more going on here than she realised. But she couldn't look away while he had his wand trained on her.