If you’re a fan of all-things Warhol, Esther Robinson’s documentary A Walk Into the Sea, about her uncle Danny Williams, is essential viewing. Williams was an aspiring filmmaker (he captured very early Velvet Underground rehearsals), member of the Factory, and was also Warhol’s lover. And in 1966, at age 27, he disappeared into the ocean. It’s been playing all weekend at the NW Film Forum and tonight and tomorrow are your last chances.