Great link. I love the part at 4:30 where it says "Apparently this is possible."
The story behind this is that there was an article in Scientific American in the early nineties featuring Clifford Pickover's procedural computer graphic images of "alien life forms". These consisted mainly of a series of spheres along a path: http://sprott.physics.wisc.edu/pickover/high.jpg
In the article, he said that these graphics were generated on special hardware, and that such images would be "impossible" on commodity PCs. Naturally, this chafed several people in the demoscene -- who set out to prove him wrong, in real-time.
I was hacking the VGA registers to optimize my bitblt to the maximum, all in assembler, and I felt I knew pretty well what was going on inside my computer. Then I ran this demo and it did stuff that I knew wasn't possible with my hardware. Quite mind blowing..