I'll go with the one that just pops into my mind... 1967, I was selected at age 16 to play guitar in a local production of the musical West Side Story... with the actual book, rented from whatever the rental agency is. The lead actor playing Tony was no other than Mandy Patinkin. The first time I opened the book I was scared witless. I had to work out a lot of the riffs on the piano first to get an idea of how stuff went, but finally got a good portion of it under my fingers. I typified the old joke- "How do you get a guitar player to turn down the amp"?