Across North America elevators move 325 million passengers every day, and most of the time, people don't give them a second thought. In TRAPPED IN AN ELEVATOR, NOVA reveals the secret life of these ubiquitous machines. How do elevators work? Are they safe? Why are so many people afraid of them? NOVA's cameras will ride the world's fastest elevator to the top of the Burj Dubai, the world's tallest building, and test whether the Burj's elevator system is ready for the task of moving people to unprecedented heights. But will the elevator-wary be comfortable handing over the reins to computers? Everybody has an elevator story. What's yours?