Ages ago, I found this R.E.M. bootleg at a now-defunct record shop. It was wonderful, and intimate, and full of strange cover versions I had never heard. Just before launching into “World Leader Pretend,” Michael Stipe says: “We’re really happy to be here at Mountain Stage. We’re surrounded by really good people, and we’re gonna do a couple songs for you.” At the time, I had no idea where, or what, Mountain Stage was… but I wanted to be there. Years later, thanks to the magic of the Internet and NPR Music, I get to experience amazing, live concerts by an enormous array of musicians. And so can you!