Fangoram wrote...
To be honest, I would give calling the police a shot, but like most, I seriously doubt I'd be able to directly intervene, unless it was someone close enough to me that I couldn't stand just letting them be hurt.
If I were more intimidating--i.e. a 6ft-something stocky man instead of a 5'4" skinny girl--I would probably intervene directly. But of course, any time you intervene you have to think about your own safety as well.