Oliver clung to Stan rather desperately as he found himself levitating off the ground and he gave a little, unsteady nod. "Right, then..." He could move his good leg... he wasn't sure it would really look convincing but as long as Pomfrey didn't see them it wouldn't be a problem.
He flashed Stan a small smile, "Thanks." he tugged on Stan's shirt, until his hand was sliding around Stans back, it was a more natural kind of grip and from afar would look better. He thought so anyway.