20 million man hours in 2 minutes.

It's a good thing someone told them precisely where to put those cranes. Interesting to note some wobble in them. Riding one of those would not be a job for which I would apply.

Judging by the past pictures Scott posted while the WTC was going up, there were a whole lot of jobs on that site that I don't belong anywhere near. Heck, just looking down from what, 80-100 stories from the edge on the computer still gives me vertigo just thinking about it! I seem to remember others commenting on the same thing at the time.

Those cranes have gear ratios that when engaged and in motion can hardly be detected at a glance.
Super cool Scott...............