[And Laura does as she said - testing different sections of the arm assembly in turn, moving it forward and back and up and down at a gentle enough pace not to shake Frannie off, getting the hand to open and close and rotate and waggle its fingers in sequence.

Until she absentmindedly tells Lucchini to adjust a setting up rather than down, and the arm spasms, turning upside-down and flinging the Witch aside!]