Roots of Mr. Bungle

System of a Down is an Armenian-American heavy metal band formed in Glendale, California, in 1994. Since 1997, the band has consisted of founding members Serj Tankian, Daron Malakian, and Shavo Odadjian (bass); along with John Dolmayan (drums), who replaced original drummer Andy Khachaturian.

Camper Van Beethoven is an American rock band formed in Redlands, California, in 1983, later based in Santa Cruz and San Francisco. Their style mixes elements of pop, ska, punk, folk, alternative, country, and world music, among other genres. The band initially polarized audiences within the hardcore punk scene of California's Inland Empire and then found wider acceptance and, eventually, an international audience. Their strong iconoclasm and emphasis on do-it-yourself values proved influential to the burgeoning indie rock movement.

Oingo Boingo was an American rock band formed by songwriter Danny Elfman in 1979. The band emerged from a surrealist musical theatre troupe, the Mystic Knights of the Oingo Boingo, that Elfman had previously led and written material for.

Slayer is an American thrash metal band from Huntington Park, California, formed in 1981 by guitarists Kerry King and Jeff Hanneman, drummer Dave Lombardo and vocalist/bassist Tom Araya. Slayer's fast and aggressive musical style made them one of the "big four" bands of thrash metal, alongside Metallica, Megadeth, and Anthrax. Slayer's current lineup comprises King, Araya, drummer Paul Bostaph, and guitarist Gary Holt, who initially joined as a touring musician in 2011 before joining the band permanently after Hanneman's death in 2013; the drummer Jon Dette is a former member of the band.

Fishbone is an American rock band from Los Angeles, California. Formed in 1979, the band plays a fusion of ska, punk, funk, metal, reggae, and soul. AllMusic has described the group as "one of the most distinctive and eclectic alternative rock bands of the late 1980s. With their hyperactive, self-conscious diversity, goofy sense of humor, and sharp social commentary, the group gained a sizable cult following".