Ever wonder what it looks like to have a controller being built? Valve's showing you how they make Steam Controllers. The video is oddly interesting and the amount of engineering that must take places for all of the stations to work must be incredible.
You can see how they start out with an empty factory floor, place various machines in, and see them all work in harmony to make the controllers. The Aperture Science logos on some of the robots are a nice touch as well. Check it out as it's pretty cool to see how it all comes together.