Whatever, I kept following her down that long corridor. Truly, a long corridor. Turning corners, going up and down short flights of stairs, we must have walked five or six ordinary buildings' worth. We were walking around and around, like in an Escher print. But walk as we might, the surroundings never seemed to change. Marble floors, muffin-white walls, wooden doors with random room numbers. Stainless-steel door knobs. Not a window in sight.