I just found these links, and thought they were cool.

The first is a clip from stairway to heaven.

Clicky Clicky


The second is a clip from another one bites the dust.

Clicky Clicky


I heard there are some other ones like this for the Chicago soundtrack, like in the movie Little Nicky.


Edit:
Also found one from britney spears
http://www.albinoblacksheep.com/flash/britney.php

thats awesome

There is also this one:
Daft Punk
But the lyrics dont make as much sense.

try here:
Jeff Milner's backmasking
He has some more backward playing

I've heard if you play rap song backwards you get smarter?

Is that derived from the joke Retards Attempting Poetry? Thats what a friend of mine told me

I was just about to post a link to that very site. This whole backmasking things is pretty freaky.

w00, pokemon rap

the pink floyd one is neat

There's one from Weird All Yankovic telling you to go do more usefull stuff then backmasking I'll see if I can find it

Quite interesting, wasent Black Sabbath accused for something near same, something like subliminal messeges... these seem weird.

Even one was found in JINGLE BELLS

I saw that a while ago, really freaked me out

holy s*** dude, didn't see that one coming. Its like 2am, s*** did I jump. LMAO

Sorry for any soiled pants.

i was showing my bro and he hit me... owy

That was funny, but I freaked out!