What happens when the price of oil tanks and suddenly you're faced with a whole lot less money to deal with your town's explosive growth?
If you're 52-year-old Rick Norby, you lose a lot of sleep.
"I haven't slept since I became mayor," he says. "I really ain't kidding you."
When Norby became mayor of Sidney, Mont., oil prices were about $100 a barrel. A year later, they've fallen to roughly half that. Yet oil production has continued to churn right along.