QUOTE(Elite7Christian7 @ Sep 24 2005, 04:15 PM)
Yes...
From WikiPedia:
"The most famous alleged backward message in a rock and roll song is based on a lyric from the song "Stairway to Heaven" by Led Zeppelin. When the words
"If there's a bustle in your hedgerow, don't be alarmed now
It's just a spring clean for the May queen
Yes there are two paths you can go by, but in the long run
There's still time to change the road you're on"
are played backwards, some claim it sounds like
"Oh, here's to my sweet Satan. The one whose little path would make me sad, whose power is Satan ... He'll give those with him six six six (666); there was a little toolshed where he made us suffer, sad Satan."
However this is only really discernible to most listeners if one has read the words beforehand."
Of course don't get caried away, it is nearly IMPOSSIBLE to sing something and have something else played backwards. Go ahead; try it.
-Edit-

Wtf is with people? Do they play everysong backwards listening for mistakes:
WikiPedia:
"The Pokemon Rap, has a reversed part as well. The words "Gotta Catch 'em All, Gotta Catch 'em All...", become
"I love Satan, I love Satan..." "