Also interesting to nerds like me is that the annoying audio in the video is a seemingly always-increasing tone called a Shepard Tone: http://en.wikipedia.org/

Also interesting to nerds like me is that the annoying audio in the video is a seemingly always-increasing tone called a Shepard Tone: http://en.wikipedia.org/wiki/Shepard_tone http://en.wikipedia.org/wiki/Shepard_tone edit: …and now reading that I've stumbled across the Tritone paradox which I wasn't familiar with and is equally cool. http://en.wikipedia.org/wiki/Tritone_paradox http://en.wikipedia.org/wiki/Tritone_paradox http://deutsch.ucsd.edu/psychology/pages.php?i=206 http://deutsch.ucsd.edu/psychology/pages.php?i=206