An incredible Rube Goldberg machine, built inside Portal 2

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Valve released tools to their community for Portal 2 map-making a couple of weeks ago, officially called the Portal 2 Perpetual Testing Initiative. Since I do not have the capacity to build great things on my own (I'm much better at finding videos of them and then sharing them with you here), I have waited with great anticipation to see what masterpieces men and women much more creative than I would come up with.

Well, this giant Rube Goldberg machine is certainly one of my favorites. You can watch the map in action below or download it so you can experience the cubed chain reaction yourself.

Now, who the hell was Rube Goldberg?

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