On the other side of closet doors, in a universe right next door to the ones explored in "Toy Story" and "A Bug's Life" (in which toys and insects live social and productive lives), lies the land of Monstropolis, a colorful but eccentric cityscape that houses beings not unlike what many of us imagined were living in closets or under beds when we were young. What has never been said of monsters, however, prior to Pixar's "Monsters, Inc." is that human children scare them just as much as they scare us, and though kids may pull blankets over their heads for fear of a furry large beast emerging from a doorway, those same large creatures live with the idea that all children are toxic and can hurt them right back.