Defacto Sound posted this short loop of audio, the sound of a tape being sped up then stopped abruptly. Each time you play it, they say, it will sound like it's getting higher in pitch. Did it do it for you? It worked for me about three times, then the effect  whatever it is  wore off. Some people report that it didn't work at all for them; others that it works every time and they feel they're going mad listening to it. Read the rest

http://feeds.boingboing.net/~r/boingboing/iBag/~3/3isCo_y7TGo/every-time-you-play-this-audio.html