“I'm sorry I started all this by trying to fly and I'd take it back if I could but I can't, so please think of it from my point of view: if you die I will have a dead brother and it will be me instead of you who suffers.Justin thought of his brother on that warm summer day, standing up on the windowsill holding both their futures, light and changeable as air, in his outstretched arms.Of course, Justin thought, I'm part of his fate just as he's part of mine. I hadn't considered it from his point of view. Or from the point of view of the universe, either. It's just a playing field crammed full of cause and effect, billions of dominoes, each knocking over billions more, setting off trillions of actions every second. A butterfly flaps its wings in Africa and my brother in Luton thinks he can fly.The child nodded. A piano might fall on your head, he said, but it also might not. And in the meantime you never know. Something nice might happen.”