Reverse Speech and Backmasking

A man named David John Oates once proposed that in casual conversation, a person produces two related sentences or words, rather than just one subconsciously. Backmasking was made popular by The Beatles. John, Paul, Ringo and George used backward vocals and instruments on their 1996 album, Revolver. Artists have since used backmasking for artistic, comedic, and satanic effect. The technique has also been used to censor words or phrases for "clean" releases of songs.
In the Summer of 1990, Judas Preist was placed on trial. The civil action alleged that they were responsible in the suicide(attempt) of James Vance and Ray Belknap, two young men in Reno, Nevada. On December 23, 1985, Vance and Belknap were intoxicated and went to a playground at a nearby church. Ray took a shotgun and shot himself in the chin and died instantly, and although James did the same, he survived. The men's parents alleged that the words "do it" has been included in the song "Better By You, Better Than Me." They alleged that was a command to pull the trigger. The trial was dismissed, and they stated that "do it" had no direct connotation.
Iron Maiden is a British heavy metal band that is touring and has been making music for over 33 years. The band came into controversy when at the beginning of Still Life, a track off their ourth studio album contained the words "The Man of Evil is Here.", most likely reffering to the devil. They stated that This was a joke and an intended swing back at the critics who had accused Maiden of being satanic.