Spastik Children was a punk rocksupergroup founded by Fred Cotton, James McDaniel and Rich "Jumbo" Sielert (vocalist of Pillage Sunday). Sielert, the drummer, was later replaced by Metallica's James Hetfield and Metallica's Cliff Burton joined on bass. After Burton's passing, he was replaced by Kirk Hammett, also of Metallica. Spastik Children allowed the members of Metallica to have fun and explore a less serious side of their musical talents. The band performed only in clubs and bars in Northern California. Their music was a raw punk style, occasionally performed with little or no rehearsal. James McDaniel and Fred Cotton's influences for Spastik were bands such as Fang, Flipper, Pillage Sunday and the Mentors. Jim Martin later joined the band as a second bass player. The music was, according to friends of the band, amazing at times but mostly hilariously atrocious. Seilert died in 2014—he is buried at Sunset View Cemetery in El Cerrito, CA.