The third Virtual Rube Goldberg Machine I made is a Halloween themed 3D animation of a physical chain reaction. Apart from the first few seconds, I simulated every movement instead of animating it by hand. This way the resulting animation is not only physically plausible but as physically accurate as possible. This makes building a Virtual Rube Goldberg machine like this just as hard as building a real one.
I started to work on this personal project in 2015, but finished it just after Halloween 2016, because there were more important deadlines I had to meet. But to me it seems that this project profitted from me being able to work on it for such a long time.