16 As soon as the woman dismissed them from the introductory class, the purpose of the contacts in their eyes became clear. A yellow line appeared on the ground so suddenly it startled everyone but the woman leading the orientation, who laughed in response to their jumps. Sara assumed, at least, that the others saw the same thing she did. “Go on, then,” the woman said. “Make like Dorothy and follow the yellow brick road!” Sara and her new companions exchanged looks, then set off along the line. They followed it into the hall and to an elevator, moving in a clump as if for protection against the strangeness of it all. No sooner did someone say, “What now?” than -3 appeared in the air before them. Sara pressed the down button and the doors slid open immediately, and they descended smoot

