Our lead actor, on a safety wire, descends the perspective stairs. Behind him, doubles or look-alikes are positioned around the stairs. Tracking points are placed on the background cyclorama to aid the insertion of more stairs and look-alikes in postproduction. The cameraman, wearing a head cam, follows our actor down the stairs. With the exposed empty tank being concrete and eight feet deep, safety was paramount and anyone near the edges or on stairs was wired. Next Photo: A special 'lightweight' pile of books were made and stuck together, with a hole to see through. The schoolchild met our actress at the base of the stairs and led her through another door. The books were made with poly board with the covers stuck on afterwards.