When Vanessa Ferguson fled Denver after the Yellowstone Supervolcano erupted, she stopped in Pueblo, Colorado and bought swimming goggles and a packet of surgical masks from a clerk in a Walgreens. There had been three packets left, but the clerk limited sales to one package to a customer to allow for more people to get them. Ferguson was surprised but pleased to get the items at list price since she had been gouged for gasoline earlier.