I heard about this today.
Brings me back to the time I met him at an outdoor concert, didn’t recognize him but her was coming down the hill behind me heading to the stage and he was carrying a violin case so I ask him if knew how to play it as he passed by and he said yup, sure do! So I said to him have a seat and play something for us and he sat down in the grass with me and my friends , took out the violin and jammed like a crazy man for about five or six minutes !! He apologized and said that he had get going because he had something going on, and he headed back down the hill, it wasn’t until about an hour later that I realized who he was when he came out on stage to play with the Band!!!