Allright, I doubt it was any surprise. GLaDOS did tell you earlier didn she?
Well, I’m sure you know what to do here, but it’s not so obvious to some people. The far wall is entirely concrete. You don’t want to be baked, (I hope) so portal across. The walls beside you are also concrete. Put a portal there, and jump through. Cross your fingers! Now that you are here, GLaDOS isn’t going to do you any favors. So here’s where the walkthrough really begins. — The Escape; Fling yourself across the cake room. Turn left. Pick up a barrel. I know, it seems weird, but it’s only when I picked up the barrel that I got the ‘party escort submission position’ achievement. Now, turn right. Go up the stai-… Nevermind, portal up the stairs. Go through the door. {Press E to open it} Go up these stairs. This door is locked. Portal through the fence. Open that door. Portal behind the fans, and under your feet in the concrete area. Watch out here, the fans will hurt you. Portal up across the acid-filled gap.
