There are a bunch of videos of cool stuff being made at coolstuffbeingmade.com, the blog of the National Association of Manufacturers. It's very satisfying watching machines crank out thousands of identical whatever-they-ares onto a conveyor belt.
This 12-minute video takes you form aluminum sheets all the way though the finished cans -- and ends -- being loaded by fork lift on the the trailer, to take 'em off to be filled with good stuff.Link
Mark Frauenfelder is the founder of Boing Boing and the editor-in-chief of MAKE and Cool Tools. Twitter: @frauenfelder. His new book is Maker Dad: Lunch Box Guitars, Antigravity Jars, and 22 Other Incredibly Cool Father-Daughter DIY Projects