A classmate and friend of mine went to CalTech. He was attending there when the Slinky came out. A group of students figured out, just how much energy, etc. it took to make a slinky go down the steps to one of the buildings. There was quite a bit of publicity about the the thing. I suppose because Slinkys had become so popular and interest was focused on them.
Enjoy,
JimB
Source: http://familywoodworking.org/forums/showthread.php?28167-Human-Powered-CNC
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