Before I saw the man’s body shake, I saw his shopping cart shake. He’d pulled out the child’s seat and put three folded shirts there, all striped through three different colorways. The belly of the cart was empty, and so I looked at his arms. They held his hands awkwardly, palms pushed forward, like a child getting ready to push up his shoulders and say Idon’tknow. Then I saw the hands themselves, their fingers and…