Until this point, noise-mongers Dinosaur Jr had never sounded so upbeat. Indeed, this seemed to be the moment that the entire American indie underground came out of its shell and decided to have some fun. But little did anyone know, this upbeat ode to joy was soon to become a fond farewell to the idealism and camaraderie of a scene that had fundamentally altered the lives of many. Goodbye indie charm, hello corporate clout. By 1988, Dinosaur Jr had silenced most of the doubters. The somnambulistic three piece had originally been the butt of many a joke, with their sloppy,…