Thousands of people converge on the small town of Marlinton, West Virginia, each fall for a feast whose main ingredients were unlucky enough to crawl, slither or lurk too close to a speeding car. It’s RoadKill Cook-Off time, where past years’ crowds have sampled dishes like Pothole Possum Stew, Fricasseed Wabbit Gumbo and Smeared Hog with Groundhog Gravy. Welcome to the world of unusual — dare we say weird — food festivals.