“The swallow's wings popped open, but they flapped awkwardly at the sides of its body like wild oars. And then, as the bird fell with skittering wings, it gave one solid thrum. This slowed its descent, momentarily. It gave another thrum, and another, and then, as if its body remembered what it was supposed to do, the bird began to beat its wings rhythmically. The muscle memory was still within it. It was still losing ground, but it was flapping at least.”