The eccentric 19th-century German musician Christian Friedrich Buschmann built the first accordion way back in 1822. We're willing to bet the kooky Kraut would have been shocked to learn that his atonal invention would someday be utilized by a pair of goofy and gangly Valley teenagers to create a comically clamorous combination of polka and punk rock. But regardless of how much Herr Buschmann might be spinning in his grave, brothers Andrew and Tristan Jemsek have used their squeezebox (along with an electric guitar and drum kit) to blast out a bizarrely boffo blend of polka and punk rock, delighting denizens of the downtown Phoenix art scene over the past two years. Influenced by everything from the accordion-happy Weird Al Yankovic to The Dead Kennedys, the Jemseks perform more traditional-sounding (yet highly hyperactive) polka jams about Divine Secrets of the Ya-Ya Sisterhood and haunted European castles, as well as raucous rock ditties about Access Hollywood and local hypnosis guru Sam Meranto. Eat your heart out, Weird Al.