In 1972, while Mickey Hart had temporarily left the Grateful Dead, he put out his first solo record, Rolling Thunder, named after Shoshone medicine man, shaman, teacher, and activist of the same name. (He's the one talking on that first mp3 below.) The album was mostly recorded in a barn on Mickey's California ranch and features lots of aggressive percussion, fast guitar solos and, most importantly, two songs that would later become Dead staples. "Pump Song", which starts off with a beat from the pump outside Mickey's barn, would later become "The Greatest Story Ever Told" and "The Main Ten", whose rain stick intro lasts for two minutes, is now "Playing In The Band." Both songs are sung by Bobby Weir and are some of the sharpest "studio" versions of Dead songs you'll ever hear.MP3: Mickey Hart - Rolling Thunder (Shoshone Invocation)MP3: Mickey Hart - Pump Song (Featuring Bobby Weir On Vocals)