Check out this Portal 2 Co-op walkthrough and beat Course 3 - Part 8 - Room 08/08 with this online demo.
Female 1: I am going to risk having you go outside the official courses one more time. The humans accidentally forgot to put a security DVD in the player. I am sure it happened by accident, but why don't you put it back in the player, for safety?
Just stop flailing around like an incompetent.
In just a moment, the word "blah" will be repeated over and over again. If at some point you hear a number rather than the word "blah", ignore it. It is not important.