Instead of starting a new thread, thought I'd place a few construction / manufacturing videos which may be of interest.
This video is probably suited to those folk who enjoy watching Blacksmiths at work with very large pieces of steel.
A Chinese forging factory using a massive pneumatic Hammer and producing a large large diameter weld neck flange.
The end result is quite impressive.
[youtube]http://www.youtube.com/watch?v=r41dcYUvNLk[/youtube]