I think what gets me is that I don't remember the last time I took him off my hip and put him down. That I didn't know, in the moment, it was the last time he would sit in my hip. I probably said something like, "Pretty soon you'll be getting too big for that" when he already was. And he probably wriggled away restlessly, knowing the truth well before I did. He was already down and sprinting away before I had the chance to look up and remember.