Reed organs are operated either with pressure or with suction bellows. Its simple design consists of an interchangeable optic attached to a flexible tube bellows. Later the derivative term was added by a further bellows and adjustable orifice. Fluid may be internal or external to the bellows. A flexible bellows often covers the exposed cable. Focusing is performed with a bellows on the body instead of the lenses. The old bellows of the organ were replaced. They also serve a purpose as insulation of the bellows. The demand for this metal resulted in improved bellows. Brian Colbert Kennedy, Katie Molinaro, Eric Bellows, and Jon Allen. The Person is immensely strong and never speaks, except in bellows and roars. After his anger subsides, Stanley remorsefully bellows for Stella from the courtyard below. Males are known to use infrasound during mating bellows. Tears run down Wallace's face as he bellows. William Sadler, Clancy Brown, Gil Bellows, and James Whitmore appear in supporting roles.