A teacher at an elementary school in Okazaki has been reprimanded for telling his third-graders this back in April: "I had a dream in which I killed everyone because you don't listen to what I say. Listen to what I say, lest dream become reality." And in a math class in May: "There are 18 kids in this room. How many days would it take to kill everyone if we killed three kids per day?" Wow, seriously?