"It ran so quickly down the tree that I couldn't see it clearly. And it was so thin anyway that there wasn't much to see. But it was like an arm. It was like a long, white, and very thin arm. But of course it wasn't an arm. Who ever heard of an arm as tall as a tree? I don't know what made me compare it to an arm, because it was really nothing but a thin line—like a wire, a string. I'm not sure that I saw it at all. Maybe I imagined it. I'm not even sure that it was as wide as a string. But it had a hand. Or didn't it? When I think of it my brain gets dizzy. You see, it moved so quickly I couldn't see it clearly at all.