Thrash Metal – Referring to a style popularised by the big four Metallica / Slayer / Megadeth / Anthrax / Testament oops that five.. Think crunchy sounding riffs, socially aware lyrical themes, snarling although not always growling vocals. Sometimes referring to the Bay Area Sound (of San Francisco) ie Exodus, Death Angel , Overkill, Heathen, Nuclear Assault, Holy Terror, Artillery, Whiplash or Canadian band Annihilator & German bands Kreator, Sodom & Destruction. Sometimes can be referred to as Speed Metal. Generation Y upstarts Havok, Municipal Waste, Evile, Bonded By Blood, Toxic Holocaust, Gama Bomb, Enforcer, Merciless Death, Warbringer, Bludvera, Manic Ritual have created a youthful resurgence of popularity affectionately dubbed the New Wave Of Thrash Metal.