Contributed by: Lee Bishop
In the gas station scene before Charlie changes into the "Virginia is for lovers" T-shirt while spying on Lulu and Ray, he pulls into the station.
As he does, if you look closely at the gas pumps, you will notice a civil war cannon on a trailer hooked to a silver van. The producers wanted a cannon and some civil war re-enactors for that scene for 'local color,' but couldn't find one at first.
They went to the State Museum of Florida in Tallahassee (which has restored artillery for various museums) and asked for the loan of a cannon. They were turned down, but one of the museum staff knew of a man who had a civil war field gun he had hand-built and used in re-enactments in the area.
The original idea was to have the cannon in the back of a truck but when the producers saw the gun on the trailer, they liked the look better. Originally, another man was to be in the gas station, but the cannon's owner looked more like what the director was looking for and he is the tall man who bumps into Jeff Daniels after paying for gas inside the store, wearing a confederate uniform. If you look closely, you'll see him and the female attendant walking by twice as Charlie is sitting in the car.
Incidentally, another scene that was filmed but never used was of the cannon's owner walking out of the store and doing a double take at the rappers outside, then walking on.