Experts say human nature is partly to blame for gas shortages across the south in the wake of Hurricane Ike.
People apparently topped off their tanks more than usual because there was widespread fear that the gasoline supply would run out.
That caused shortages and temporary shutdowns of stations, which in turn led to more shortages and skyrocketing prices.
Economists say that response is not unusual. People are hard-wired to respond quickly when they are scared.