At the elementary school where I teach, we recently had a problem with students throwing rocks. The principal made an announcement over the intercom warning students that anyone caught throwing rocks would be taken home by him personally. Later that day, during afternoon recess, a teacher admonished a kindergartner for throwing a rock.

"Didn't you hear what the principal said this morning?!" the teacher said in disbelief.

"Yeah," replied the proud lad, grinning from ear to ear. "I get to go home in the principal's car!"