Most of the time when something goes bad—a marriage, a war, a run of good luck—you don’t know it. It’s like in the cartoons, only less funny. You run off the cliff and just keep going—talking, listening to music, making plans, for years sometimes—except no announcer interrupts to say ‘Excuse me, collect call for Mr. Coyote’ to make you notice and make us laugh. You just wake up and fall.