 The armor was also designed to have only its top half worn at times.Stan Winston Studios built a , animatronic version of "Iron Monger" (Obadiah Stane), a name which Obadiah Stane calls Tony Stark and himself earlier in the film as a reference, but is never actually used for the suit itself in the film.The animatronic required five operators for the arm, and was built on a gimbal to simulate walking.