I've witnessed something similar. During the 2008 Olympics, I studied abroad in Beijing and was pretty fortunate to stay at the BNU campus where they hosted the

I've witnessed something similar. During the 2008 Olympics, I studied abroad in Beijing and was pretty fortunate to stay at the BNU campus where they hosted the training complex for the U.S. Olympians. I saw with my own eyes a 5 story training complex built from the ground up in two weeks. They did it in day/night shifts. One team worked day while one team worked night. At around the 12 hour mark they would switch off. They wore no helmets or masks and worked quite rapidly. There was maybe one or two hours when the building was not being worked on. In the end, the product was impressive and sturdy. The building looked slick and I know for sure our athletes liked it. I saw the swim, fencing, and basketball teams walk in and out of it.