I was shocked to learn that my international trade students were unfamiliar with the Cone of Silence (not to be confused with the Cone of Diversification). I can only conclude that children today aren't raised properly - in front of the TV watching reruns - as I was. Or perhaps they just watched different reruns?
For the sake of cultural literacy, via YouTube, a demonstration of the cone, and the classic opening of the show, "Get Smart." Here's more about the show. The movie, starring Steve Carrell and Anne Hathaway should raise awareness of the threat from KAOS when it comes out next year.