If you've ever looked toward the front of St. Thomas of Villanova Church during Sunday Mass - left side, near the altar - you may have wondered why a select group of people there were laughing. It is because they know something you do not know. They are liturgical ministers. They are laughing at all the things that go wrong during Mass. To the untrained eye, everything appears to be going smoothly. But to the group that runs around behind the scenes, no Mass is ever without a slip-up. Rule number one in Liturgical Ministry: always pretend you know what...