You and Wheatley finally made it to where GLaDOS was. You managed to shut her down and make Wheatley in charge, but he grew mad with power within like a minute because he’s a moron. He was so mad, he turned GLaDOS into a tiny version of herself, trapping her in the body of a child with the same face (just like when she got turned into a potato).

After falling down, you’ve finally made it back to the test chambers, GLaDOS obviously being herself and being very sarcastic and rude whenever she can, because she’s an AI designed to do that.

While being in one of the test chambers, GLaDOS looks up at you, being only about up to your stomach.

“I’m going to kill you when I’m in charge of the facility again.”