music on Instagram: "A highlight of any Tenacious D concert is the moment Kyle Gass produces the Sax-A-Boom, a bright plastic toy saxophone. Although it’s merely a children's electronic device that plays pre-recorded loops, Kyle performs with it as if he’s shredding a world-class solo, driving the fans into a frenzy. This routine has become a legendary staple of their live sets. Jack Black typically builds massive anticipation, hyping up Kyle’s "instrumental genius" before the glorious, goofy so