"Why simply turn on a light switch when you could light a candle which burns a string, which releases a bowling ball, which lands on a bag of air, which blows over some dominoes, which knock an action figure into a pot, which onto a piece of metal, which startles a chicken, which lays an egg, which rolls down a ramp and breaks open on a brick, then drains into a cup which weighs down a board which flips the light on?" -- Atlas Obscura takes a surprisingly uncomplicated look at Rube Goldberg machines in movies.
Lego Great Ball Contraption. (YouTube). Not enough balls? Try this one. (YouTube) More about Great Ball Contraptions: one two
Top 10 Food-Based Rube Goldberg Machines (videos) If this type of food preparation is too elaborate for your tastes, the Super-Fast Pancake-Sorting Flexpicker Robot might be more to your style.
Incredible Machine 01 - clever Japanese Rube Goldberg type devices in action. Film clip, annoying soundtrack alert. (via digg)