The Matoran wasn't quite sure just what happened next.  One second, everything was normal, and the next he was inside a cell made of some sort of clear, metallic substance.  He could see out, but when he tried to speak, no sound escaped his mouth.
	"Matoran should be seen and not heard," Avak growled. "And even seen is debatable."

 ~Greg Farshtey Bionicle Legends #1, Island of Doom, pg 24