In hour three of our crash course on mega-skyscraper construction, we learn about the human element and development of systems that make us comfortable. And we’ll see the evolution from freight hoists to today’s fastest high-speed pressurized elevators and, on the cooler side, the evolution from ice refrigeration to 3,000-ton chillers. We meet Bobby, the manlift operator and the building site’s standup comedian, and travel to Taiwan to visit the world’s fastest elevators in the TAIPEI 101.