Roots of King's X

Extreme is an American rock band formed in Boston, Massachusetts, in 1985, that reached the height of their popularity in the late 1980s and early 1990s. They have released six studio albums, two EPs and two compilation albums since their formation. The band was one of the most successful rock acts of the early 1990s, selling over 10 million albums worldwide.

Overkill is an American thrash metal band, formed in 1980 in New Jersey. They have gone through many lineup changes, leaving bassist D.D. Verni and lead vocalist Bobby "Blitz" Ellsworth as the only remaining original members. The band's current lineup includes Verni, Ellsworth, Dave Linsk on lead guitar, Derek "The Skull" Tailer on rhythm guitar, and Jeramie Kling on drums. Notable former members include guitarists Dan Spitz, Bobby Gustafson, Merritt Gant and Joe Comeau, and drummers Rat Skates and Jason Bittner.