Darby is excited to go on a "volcano watch," camping out and observing the island's volcanoes, despite recent small earthquakes that could mean an eruption is coming. After all, Darby grew up in California, so she's used to the earth rumbling now and then. Plus, the expedition is perfect for working with Hoku, helping the young mustang learn to handle any situation. But when the volcanoes do erupt, it's much scarier than Darby anticipated, and a stream...