From a long line of Twentieth-century road-trip movies, The Grapes of Wrath, whose poor whites flee the Dust Bowl in jalopies, and Easy Rider’s hippies speeding by on choppers make an obvious double feature. When you live on the fringes, they say, you eat what you have. You go where you need to go. Locals overhear your freewheeling vernacular. Armed with automobiles and axe handles, locals go on the offensive.