You reach A-108 (or really anywhere after A-100). You are in a W-Shaped room, A room shaped like a W. Two[?] grey lockers reside in between the two walls which give the room it's name. This room may occasionally appear as a smaller version, with one[?] grey locker in between. The room will always have a few lockers on the walls. You hear A-100s spawn sound and see it in its inactive form.