you wake up to the announcer saying over the loudspeaker: "Good morning, -test subject 777-. today, you will be paired with test subject -3910- for testing, please go to the beginning of testing track -0059- to begin testing. thank you." you pull on your Aperture Science jumpsuit while your relaxation vault is transported to test track 0059, and when it arrives and you step out, you see 3910, or Chell, you heard about her, about how she didn't speak, and her grim determination, her ears perk up when she saw you, and her eyes narrowed, looking you over: