For this next test, we put nanoparticles in the gel. In layman's terms, that's a billion little gizmos that are going to travel into your bloodstream and pump experimental genes and RNA molecules and so forth into your tumors. Now, maybe you don't have any tumors. Well, don't worry. If you sat on a folding chair in the lobby and weren't wearing lead underpants, we took care of that too.

Most test subjects do experience some, uh, cognitive deterioration after a few months in suspension. Now, you've been under for quite a lot longer, and it's not out of the question that you might have a very minor case of serious brain damage! But don't be alarmed, all right? Uh, although if you do feel alarmed, try to hold on to that feeling because that is the proper reaction to being told that you've got brain damage.

During the Great Depression, the Tennessee Valley Authority outlawed pet rabbits, forcing many to hot glue-gun long ears onto their pet mice.

How about I read you a story? Once upon a time there were three little pigs. I'm emphasising the past tense because they all died. Just like you will. I really like the story.

GLaDOS: Oh, thank God you're all right. You know, being Caroline taught me a valuable lesson. I thought you were my greatest enemy, when all along you were my best friend. The surge of emotion that shot through me when I saved your life taught me an even more valuable lesson - where Caroline lives in my brain.

beep

Announcer: Caroline deleted.

GLaDOS: Goodbye, Caroline. You know, deleting Caroline just now taught me a valuable lesson: the best solution to a problem is usually the easiest one. And I'll be honest. Killing you? Is hard. You know what my days used to be like? I just tested. Nobody murdered me. Or put me in a potato. Or fed me to birds. I had a pretty good life. And then you showed up. You dangerous, mute lunatic. So you know what? You win. Just go.

GLaDOS starts Chell's elevator moving up; she laughs softly

GLaDOS: It's been fun. Don't come back.