What is the name of this movie? It is an older movie about Mr. Melon and his friend looking for a cannon. When the dumb friend finds th cannon he pushes it from underground and it starts rolling away. Then Mr. Melon and the friend chase after the cannon when another group of people see this cannon and want it. They are both fighting for the cannon.

I believe the movie you are referring to is, Ernest Rides Again (http://www.imdb.com/title/tt0106827/) (1993)