Reminds me of the first Dirty Hary movie, where the mator is chastising Harry for a shooting incident, and arry Says that when he sees a man chasing a woman with the intention of raping her, he shoots the bastard. The mayor asks how he knew the guy's intentions, and Harry says (paraphrased) "well, when I see a six foot naked guy chasing a woman with a knife and a hard-on, I know he isn't out collecting for teh Red Cross".
