Marc Spitz’s Gravity Always Wins takes its title from the Radiohead song “Fake Plastic Trees.” The domestic comedy is an exploration of the dangers of giving in to dread in an increasingly frightening world. The Williams family (a middle-aged father, his two troubled sons, and their estranged wives, girlfriends, and boyfriends) is on a desparate, collective search for peace of mind via drugs, porn, escort services, friendships with neighborhood children, Michael Jackson-inspired cosmetic surgery, pop psychology, tropical fish, and impregnation of the French.