Dining Chicken
To illustrate preemptive multitasking orchestrated by a central processor I use a Russian toy that reminds me of the dining philosophers problem that usually opens any textbook on concurrency:

Here is the video (you need to download and install Xvid MP4 codec if your computer doesn’t play it):
Download DiningChicken.avi (1.2 Mb)
- Dmitry Vostokov @ DumpAnalysis.org -