There are many things you can't do in China, but bungee jumping isn't one of them. At 764 feet (233 meters), jumping off the Macau Tower is the longest bungee jump in the world. The jump is the size of two-and-a-half football fields. Jumpers accelerate to a top speed of 124.27 miles (220 kilometers) an hour. It's a 4 to 5 second free-fall that then stretches the bungee cord 164.04 feet (50 meters) [source: Macau.com].