I'm not really debunking anything, but I didn't know where else to put this. One of the chaps I hang out with sometimes used to lecture computer science at a Melbourne university. He's done some physics of course - you must in such degrees. So we're all talking crap one day, and this fellow pipes up with the idea that playing a stream of sound backwards in opposition to the stream itself (ie. if you play Stairway backwards from point A while it is played normally from Point B), you cancel out the sound, so there is silence. I can only assume the person has absolutely no idea what destructive intereference is all about. A truly whacky idea, and this was from a university lecturer. Amazing but true!