When a person has been stretched to their limit, they may start to seem flaky and checked-out. They might come in to work late or cancel plans with friends at the last minute. They’ll have less drive to do chores or cook meals and may take frequent naps or zone out by playing repetitive video games. In general, they’ll have worse impulse control and far less energy than they used to. These aren’t signs that someone is a screwup or a failure. They’re signs of a person pushed to the brink.