Happened to you? I mean, have you been attacked IRL by someone wielding a blade trying to kill you?
one of the cops in our dojo was telling us a story just a few weeks ago about another officer getting called to a disturbance in his (the guy telling the story) own neighborhood. The officer shows up, guy walks out of his house weilding a katana and proceeded to charge the officer. He put him down (survived) but man, there are crazies on every corner these days.