bands exemplified by The Knack, or the photogenic Blondie, began as punk acts and moved into more commercial territory. Post-punk If hardcore most directly pursued the stripped down aesthetic of punk, and new wave came to represent its commercial wing, post-punk emerged in the later 1970s and early 80s as its more artistic and challenging side. Major influences beside punk bands were The Velvet Underground, The Who, Frank Zappa and Captain Beefheart, and the New York-based no wave scene which placed an emphasis on performance, including bands such as James Chance and the Contortions, DNA and Sonic Youth. Early contributors to the genre included the US bands Pere Ubu, Devo, The Residents and Talking Heads. Although many post-punk bands continued to record and perform, it declined as a movement in the mid-1980s as acts disbanded or moved off to explore other musical other areas, but it has continued to influence the development of rock music and has been seen as a major element in the creation of the alternative rock movement. Glam and extreme metal In the late 1970s Eddie Van Halen established himself as a metal guitar virtuoso after his band's self-titled 1978 album. Inspired by Van Halen's success and the new wave of British heavy metal, a metal scene began to develop in Southern California from the late 1970s, based on the clubs of L.A.'s Sunset Strip and including such bands as Quiet Riot, Ratt, Mötley Crüe, and W.A.S.P., who, along with similarly styled acts such as New York's Twisted Sister, incorporated the theatrics (and sometimes makeup) of glam rock acts like Alice Cooper and Kiss. The lyrics of these glam metal bands characteristically emphasized hedonism and wild behavior and musically were distinguished by rapid-fire shred guitar solos, anthemic choruses, and a relatively melodic, pop-oriented approach. By the mid-1980s bands were beginning to emerge from the L.A. scene that pursued a less glam image and a rawer sound, particularly Guns N' Roses, breaking through with the chart-topping Appetite for Destruction (1987), and Jane's Addiction, who emerged with their major label debut Nothing's Shocking, the following year. In the late 1980s metal fragmented into several subgenres, including thrash metal, which developed in the US from the style known as speed metal, under the influence of hardcore punk, with low-register guitar riffs typically overlaid by shredding leads. Lyrics often expressed nihilistic views or deal with social issues using visceral, gory