James 'PJ' Ransone was so alarmed on hearing muffled cries for help from the lower floor of his New York apartment building he ran downstairs to save her brandishing a metal bar.
When the assailant took flight, the actor pursued him down the street, eventually catching him after landing his make-shift weapon on the attacker's back.
Police were so impressed with Ransone's brave actions they've begged him to join the force, but the 26-year-old plays down his street justice heroics.
He tells Web site PageSix.com, "All of my friends would have done the same thing, but nobody else in my building came out. I did what anybody would have done.
"I pictured my mom, my girlfriend and every girl I've ever loved and thought, 'Vengeance is mine.' I said, 'You rapist piece of s**t' and heard a crack when I hit his shoulder blade. He mimed taking out a gun and said, 'Do you want to go to jail?'--and made a bee-line for the door.
"I cried, 'I'm not done with you yet,' and kept swinging. "I don't want any casting directors telling me I'm not tough enough."
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