So I’ve watched it twice, but the trailer for American Zombie, co-directed by Grace Lee and John Solomon, and releasing March 28 via Cinema Libre, does little to advance a positive case for this mockumentary about “high-functioning zombies living in Los Angeles, and their struggles to gain acceptance in human society.” I guess this seemed like a hot idea after Shaun of the Dead and the first, legitimately clever wave of those Geico “Caveman” ads, but there’s not a single moment here — with the arguable exception of the Asian zombie woman talking about her hopes and dreams, then losing her train of thought — that evidences rich, inventive parody, let alone a moment that pops, which is really what an independent flick’s trailer has to have. And what’s with all the hand-held action-cam stuff in the last third of the trailer?