Toa Kongu was in a unique situation.  He had to keep his mouth shut.
	He had not gone more than two steps when Avak's power to create the perfect prison enclosed him in what looked like a giant Zamor sphere.  Kongu barely had time to gulp a mouthful of air before the sphere turned into a vacuum chamber.  Now, no matter how much air Kongu created with his elemental power, the sphere absorbed it.  Opening his mouth would mean instant death.

 ~Greg Farshtey Bionicle Legends #3, Power Play, pg 76