My grandmother (all 4'10" of her) was coming off the commuter train at New York City's Grand Central Station in the late 70's when a six-foot-tall mugger grabbed her briefcase and tried to run off with it. Refusing to let it go, she whipped it around and whaled him in the head with it, laying him out cold.

An NYPD officer observed the scuffle and was laughing himself sick. Mad as hell, my grandmother marched up to him and demanded, "Aren't you going to do something!?"

The officer responded, "Lady, it looks like you took care of it for me."