By Tanner Garrity Whatever your thoughts on Forrest Gump — elemental Americana or overrated mush — you probably remember feeling something stir in your bones during the film’s cross-country montage. Gump runs through meadows and mountain ranges in some of the country’s most beautiful corners, as Jackson Browne’s “Running on Empty” plays in the background. After two years (or roughly six minutes, in movie time), he decides he’s exorcised whatever it was that was haunting him, and starts walking home. Forrest Gump posits the cross-country caper as a spiritual journey. It’s one that’s been repeat…