Tuck everlasting

The guy looks pretty creepy and Winnie picks up on this,

His tall body moved continuously; a foot tapped, a shoulder twitched. And it moved in angles, rather jerkily. But at the same time he had a kind of grace, like a well-handled marionette. Indeed, he seemed almost to hang suspended there in the twilight. But Winnie, though she was half charmed, was suddenly reminded of the stiff black ribbons they had hung on the door of the cottage for her grandfather's funeral.