Around the age of 10, I went to the annual local city fair. Rides, attractions, flea market type vendors, food, etc. Somehow a friend and I stumbled across a nondescript booth inside the main building. I forget what drew us into it but long story short, it was some religious group giving out free cassettes featuring an analytical dissection of Stairway to Heaven. Of course, the narrative was how evil and satanic the song was, when played backwards lol. That cassette must've been an hour long with many song sections isolated and reversed. E.g. "My sweet satan, blah blah blah, etc". Even at that young age I saw through that bullshit!