Ladies and gentlemen, for your consideration -- a real-life Rube Goldberg machine! As you may or may not be aware, Rube Goldberg was an early 20th century cartoonist (and engineer). His cartoons depicted imaginary machines capable of performing ordinary tasks in an extremely complicated way. Here in these modern times, we see the Rube Goldberg legacy in the children's game called "Mousetrap." In the educational arena, the building of Rube Goldberg machines has become a popular project in high school and college physics classes, and for hobbyists dabbling in this whimsical genre. Why? Because these contraptions beautifully illustrate a number of fundamental physics principles.