A few more details: the shoot took nine days to complete, it's the first major conflict in the movie and the town of Plano, Illinois, plays Smallville, Kansas. The mayor even gets a cameo. Look out for a particularly oh-my-god-I-can't-believe-this-is-happening bank teller.
Wait a sec. I'm reading this as the mayor of said town is the cameo. Am I the only one?