Freedom State (2009)

Written and directed by indie filmmaker Cullen Hoback, this high-concept comedy centers on the exploits of eight mental hospital patients who awaken to discover that they've just slept through the apocalypse. Determined to find the edge of the world, the former residents of Lost Acres load into a short, yellow bus and embark upon a cross-country journey to rescue potential survivors and plant the seeds for a new society, fashioned to their liking.