They had been wandering through the forest for about an hour, absently wondering whether Percy would even be able to contain the amount of annoyance required to respond properly to this level of irresponsibility or if he would just explode, when the faint sound of clicking made both the twins freeze in place. They'd eschewed lights in hopes that letting their eyes adjust would allow them to see better, but it was unfortunately quite a bit darker than they'd expected, and although they had adjusted they still couldn't actually see very well. All either could see were great black masses shifting in the trees, which they had previously assumed were the trees moving. It was beginning to be obvious, however, that there was something in the trees. Something very large, and something that was probably not a unicorn.