ANSWER: The manual clicking of a channel on an old television. You see, kids, back in the old days, people switched channels by turning a knob.
Again, let us know if you have any other suggestions.
Keith Shaw rounds up the best in geek video in his ITworld.tv blog. Follow Keith on Twitter at @shawkeith. For the latest IT news, analysis and how-tos, follow ITworld on Twitter, Facebook, and Google+.