Tom Macrae

This is the story of a boy who wakes one morning to find an "Opposite" on his ceiling. Throughout the day, the Opposite gets the boy into all sorts of mischief, and each time the boy tries to point the Opposite out, the opposite happens and it disappears. Finally, the boy has a clever idea and states the opposite of what he really means, and the Opposite appears at last, and everyone knew the boy wasn't lying all along.

At least nobody woke up as a cockroach.