As regular readers of SF Weekly's film section can attest, there's never a shortage of documentaries playing in town, and some of them are even pretty good. But one can always trust SF DocFest, now entering its 15th big year of truth-bomb blitzkriegs, to provide the really good stuff. This year's venues are the Roxie, the Vogue, and the Great Star in Chinatown, which makes its proud return to the festival circuit after sitting out this year's CAAMFest. Films of note this week include Graham Elmwood's Ear Buds:The Podcasting Documentary, which (as the subtitle implies) is not the latest in Disney's beloved franchise about dogs playing sports — we can dream! — but rather about humans who create podcasts. Similarly, Brian Davis' The Million Dollar Duck is not a remake of the 1971 Disney trifle that Roger Ebert called "one of the most profoundly stupid movies I've ever seen," but in fact a very smart look at the subculture of wildlife artists who compete for money and postal glory in the Federal Duck Stamp Contest, which is a thing that exists. But most exciting is Andrea Marini's Art of the Prank, about RE/Search-famous prankster and culture jammer Joey Skaggs, one of the few people for whom the term "culture jammer" truly applies. Jam on, Joey.