When I was ten, my friend and I got excited by the rumor that if you play Queen's "Another One Bites the Dust" backwards, it says "Smoke marijuana." We tried it and it sounded clear as day! Then we played it for my dad who laughed and said that to him, it sounded like "Go to California." Of course, this was during the heyday of fantastic urban legends about the occult and backmasking in rock music. Evangelist Michael Mills fueled the insanity with this 1981 radio broadcast, featuring bits by Black Sabbath, The Beatles, Led Zeppelin, Judas Priest who famously went to trial (and won) over bullshit accusations of backmasking.
!nataS liaH