A collapse or "falling over" would not breakdown in that manner. Given the weight distribution of the tower's structure and the prongs you described, even if the tower did tilt from the bottom, it would most likely shatter in half or numerous parts fairly early in the fall. The force of each glass floor or wall breaking away from the tower would then cause more damage farther up, but it would be limited by the number of floors or walls left standing. However, this is all just speculation based on how a typical glass skyscraper would break down. No one knows for sure how the CN tower will fall because no one has ever seen it collapse before. When complete, the CN tower was the tallest free-standing structure in the world at 1,815 feet (541 m). It has since been surpassed by two other buildings. One is the 2,716-foot (828 m) Shanghai World Financial Center, which opened in 2009, and the other is the 2,747-foot (853 m) Burj Khalifa in Dubai, which opened in 2010. The CN tower is still the third-highest building in Canada behind only the Chrysler and John Hancock buildings in Chicago. The CN tower is located in Montreal, Quebec. It was built as a symbol of Canada's participation in the Olympic movement and as an attraction for tourists to Montreal.