original_query: What is the Hooterville Cannonball?
query: What is the Hooterville Cannonball?
answer: The Hooterville Cannonball is a fictional railroad train featured in the American sitcom Petticoat Junction.  It's an 1890s-style train, described as an 'important character' in the show, operating on a forgotten spur line.  It was even used as a basis for songs within the show.