My martial arts teacher once said that the cowards are the ones who attack you from behind. This means that if you show any amount of backbone, they’re more likely to back off than somebody who, say, punches you in the face. These are the sorts of people who are also less likely to be armed, which definately helped our heroine.
I would have liked a little more back story on this student, tho. I’m always interested in why some people fight back and some people don’t (again, them not being armed and her knowing how to use a baton probably helped).