Our music teacher (whose name was Tom Jones. If only that Tom Jones) would deal with disruptive pupils in a class by hurling the wooden blackboard eraser at a pulls head where it would hit them directly on the forehead. He was a supreme marksman. Saw a kid lose consciousness from the impact one. Wham! And suddenly there's was just a cloud of chalk where a kid once sat. This man was also in the Salvation army (clearly attack division)