She didn't know how long she had been unconscious, but she didn’t know that if it had been longer than five minutes, the men she had left at the restaurant were already looking for her. At a minimum, she just needed to stay alive long enough for them to find her. At best, Crabbe is working on his own and she manages to escape on her own. If only she were as good at wandless magic as Draco was, this would be a much easier feat. 