This reminds me of when people talk about hearing demonic messages in popular songs when played backwards. I think Stairway to Heaven is one of the more famous examples
Also, this phenomena is occurring to me frequently as my 2 year old nephew is learning to talk. He tries to communicate with me, saying a word over and over and it doesn't click until he points at the object he's talking about or my sister tells me what he's saying and then his mangled speech suddenly makes complete sense.
Our brains are so cool.
http://reversespeech.com/reversal/popular-reverse-speech-exa...
http://en.wikipedia.org/wiki/Reverse_speech
http://www.tcprs.com/evps.html (disembodied voice examples.)