The recent media discussion of the “I shot the prick” is rather distasteful. That’s the discussion about a “hidden message” in the recording of David Bain‘s emergency phone call on the day his family was murdered.
Whether or not this should have been submitted as evidence during the trial there is no doubt that the interpretation is highly imaginative. Trouble is with these sort of things, once you are told what the alleged “hidden message” is there is no way you are not going to hear it. We are all very suggestible this way.
Michael Shermer describes a beautiful example of this illusion using the song “Stairway to Heaven“ played backwards. Initially you don’t make sense of it but once you are told what the message is meant to be you can’t help hear hear demonic lyrics. He describes this phenomena, and other similar illusions in his TED talk “Why people believe strange things” in the video below. He also goes into this perception problem in his book Why People Believe Weird Things.