The Weighted companion Cube was deployed after GLaDOS's countdown, and was followed with a boilerplate reminder.
"The Enrichment centre reminds you that the Weighted Companion Cube will NEVER threaten to stab you and, in fact, cannot speak. In the event that the Weighted Companion Cube DOES speak, the Enrichment Centre urges you to disregard its advice."
"Yeah yeah, sure." Chell caid, annoyed at how GLaDOS always pointed out the obvious as though she were a moron. "Give me a complicated piece of machinery to test and remind me that a metal cube can't speak. Makes a lot of sense."
"Psst!" A voice came from the direction of the cube.
"Huh?" Chell looked around. "Who was that?"
"It's me. Your companion cube!"
"Great. I'm losing it."
"Give me that gun, or I'll stab you!"
"You have a knife, a deadly weapon in my eye, and you want a vomit comet like this? That sounds kind of dumb."
"You heard me, bh. Gimme that gun!"
GLaDOS cut in on their argument.
"The Enrichment centre takes this opportunity to remind you that you still have a test chamber to complete. Please avoid bickering with your weighted companion cube, which, the Enrichment Centre reminds you, cannot speak.
AFTER THE TEST.
"For the 9000th time in as many tries, I WILL NOT GIVE YOU THE DANG GUN!" Chell screamed.
"No! Seriously! I've got a K-bar right here! Oh… so sharp…"
"The Enrichment centre congratulates you on finishing the test chamber." GLaDOS said. "However, the Weighted Companion cube cannot stay with you for the rest of the test chambers and must be euthanized."
"Good riddance, cube!" Chell hurled it into the incinerator.
"Whoa! It's kinda hot in here!" The cube said. "Ohh... Oh my GOD! I'm SORRY FOR EVERYTHIG OH MY GOD..."