Oh, I sense Stairway to Heaven is going to pop up soon...

Yeah that one is hella-creepy (no pun intended).

I wonder how they put those in there anyway... is it something like and/or/xor or some other mathmatical function done with the audio or is it just really careful choosing of words that sound like other words backwards (like in the Mario thing, which seems to be phonetically correct both ways)? Maybe someone could invent some cool way to put two songs in one all the time so when you buy one CD with 15 songs, you're really getting 30 or something like that.

Huh, that's crazy. I love that one flash movie that has all kinds of reversible songs and their reversed version.

If you listen to "One More Time" by Daft Punk backwards you'll hear...'strangely provocative' lyrics.

Oh really? I'll have to try that at some point.

I've heard that voracious lie before. It's nothing but a hoax.

Play it backwards yourself using Audacity or something; it's not a hoax.