Remember how your mother always told you to stay in public places with people around to be safe? Remember that bit of advice about seeking out such places if you are being chased--running in and screaming, if necessary to deter your attacker with the possibility of witnesses?
Don't count on any help from the public, even if you are bleeding to death. Instead of using their cell phones to call 911, they'll probably just take pictures.
Nod: Christina Dunigan