i've just been reminded of the 2nd funniest letter to Guitar World I ever read, "Last night I was practicing the solo to AC/DC's Back In Black from your transcription in the June issue, when I suddenly felt a shooting pain down my entire arm. To my surprise, I had broken a string which had flown right into my arm, and stabbed it's way a quarter of an inch in! Needless to say, I pulled it out and kept rockin'."
the best one was a letter from some dude who said "thanks for a crappy issue... i'll be cancelling my subscription. my parakeet is enjoying his daily sh|t on the green day article."