Foo Fighters, Sysytem Of A Down, Disturbed, Volbeat, Social Distortion, Apocalyptica, Lacuna Coil, Bullet For My Valentine. A hard-rock festval on the outskirts of the city of Interlaken in Switzerland. This year (its sixth) Greenfield offers up the nicest man in rock, Dave Grohl's rock Gods FF, Armenian-American eerie hardcore metallers SOAD and the bafflingly popular Chicago nu-metal lumberers Disturbed.