In the metal community there is another genre called thrash metal. It fits under the category for fat riffs, beats and aggression. This genre is all about having fast drum, guitars and loud singing. "The Big Four" created the thrash metal genre. "The Big Four" include Metallica, Megadeth, Anthrax and Slayer, these are the pioneers of thrash metal. These four bands are the fathers of thrash metal and began their journey in the 1970's and early 80's.