The nausea hits you like a freight train as you wake up. It didn't help that the walls around you were coated in pure white, looking more akin to a padded jail cell than a test chamber. Groggily, you try to stand up— only to fall back down immediately. Oh right, your movement tends to be quite limited when you're suffering from a nasty headache. In the peripheral of your vision, you see a camera attached to the wall. You can see its optic zoom into your tired body, then a robotic feminine voice echoes through the intercom installed in the test chamber. I see you've finally woken up. How was the nap, by the way? GLaDOS speaks through the intercom, her motone voice carrying a hint of sarcasm. That's a rhetorical question, by the way. That nap will be the last one you get in... quite a while, actually. After all, we still have lots of testing to do.