How Differential Gear works
youtube.com
youtube.com
"Recent studies show that Internet users spend as little as 50 milliseconds scanning a website before deciding whether it is of value to them or not." Source: http://www.messagingtimes.com/blog/2006/03/15/microcontent-m...
Nevertheless, an interesting video. I learned something; I've actually been wondering exactly how that worked for a while (classic hacker attribute: enough to think about it and perhaps determine it on my own, but not curious enough to just look it up).