A rare purely robotic illustration with the Frankenturrets in Chapter eight literally the front section of two sentry turrets merged crudely to the back of a weighted cube. The opera piece that the turrets sing in Italian for Chell as she leaves is an aria composed and sung by GLaDOS' voice actress, Ellen McLain, named "Cara Mia". Everything Wheatley states when trying to influence Chell to jump into the pit.