"I found this link through a post about 'Demonstrations of Implicit Knowledge' from Colorado's Cognitive Science comunity on LiveJournal (full disclosure: I am an employee of Six Apart, Ltd., and work on LiveJournal)."
Link (Some other cool demos)
Mark Frauenfelder is the founder of Boing Boing and the editor-in-chief of MAKE and Cool Tools. Twitter: @frauenfelder. His new book is Maker Dad: Lunch Box Guitars, Antigravity Jars, and 22 Other Incredibly Cool Father-Daughter DIY Projects