Carla shed her jacket and pinned on the employee badge. Then she made her way by feel to the photon tube-slide. It would be the fastest way to put some distance between herself and the tour guide. Just as she reached it, a handful of emergency lights—those powered by battery and thus independent of the main computer system—started to flicker to life. But these only dimly lit the area; there were still enough shadows—and enough confusion, among the milling visitors—for Carla to jump into the tube and escape unnoticed.