A head was shooting upward from the ground; limbs were sprouting; a moment later, a man was standing where Scabbers had been, cringing and wringing his hands.
I'm sure you're quite aufait with wringing out excess water but you may well find that this mangle helps you in that process. Always be sure to use a mangle cloth.
He merely took the handker chief and kept on using it, wringing it out with both hands whenever it got too wet to be any more use, so that presently Lucy was standing in a damp patch.