If you thought the nerdy-white-guy-rapping movement began and ended with the "Lazy Sunday" video, maybe it's time to check out Nerdcore Rising, a documentary screening at the Palace Cinema 9 at 7 p.m. on Sunday, May 4, as a benefit for the Vermont International Film Festival. Burlington filmmaker Bill Simmon caught the premiere of the film last month at the South by Southwest film fest in Austin, Texas. He convinced director Negin Farsad to bring his doc about rapper MC Frontalot - the "godfather of nerdcore" - to Vermont, where Farsad will answer questions about the movie and the viral spread of geeky hip-hop on the Internet. "MC Frontalot raps about Magic: The Gathering, Internet porn addiction - all the things I care about!" raves one enthusiast in the film, which also features analyses of the genre from Jello Biafra and "Weird Al" Yankovic. Rock on, dungeon masters . . .