At SF IndieFest: Jolly pranksters, sonic tricksters and a madcap murder spree

‘Poundcake,’ about the media circus set off by a serial killer who targets Brooklyn’s white men, is hilarious. Also worth seeing: Ryan Worsley’s ‘Stand by For Failure,’ about the band Negativland, and ‘Chop and Steele,’ about the creators of the Found Footage Festival.