i recently was listening to zeppelin and i heard there was evil messages in it if you played stairway to heaven backwards.. so i did a yahoo search for stairway to heaven backwards and came up with this site that has other songs with the samething.. check this site out.. i find this very cool.
http://www2.memlane.com/jmilner/stairwaybackwards.htm
this is just plain cool and creepy at the same time.