have you guys ever heard of reverse speech? basically this guy claims that if a lie is told in forward regular speech, the truth can be heard when you reverse it. hes got all sorts of samples from famous cases like jon bennet, oj simpson, kobe, bush, ect. music ones too. but its much the same as these other examples posted, if you didn't know what to listen for before hearing it, it just sounds like garbbled nothingness. either way, check it out if you're interested in that type of thing
http://www.reversespeech.com/revlab.htm