Boone and Locke are wandering through the woods, with Locke blowing what appears to be a dog whistle. Boone says the whistle doesn't appear to work, because he is apparently the only one in the world who doesn't know that dog whistles are inaudible to human ears. "You can't hear everything, Boone," says Locke. "The sooner you learn that, the better," he adds, whatever that's supposed to mean. So they hear this rustling in the bushes, and...
Wait a minute. Do you mean to tell me that no one's looking for Claire, that Boone and Locke even just pretended to look for her, and no one's going to not even now that they have a possible location, but Vincent goes missing and Boone and Locke immediately start searching (even though, as Locke himself pointed out, Vincent found his way back once and likely will again)? Are you fucking kidding me? You bastards all deserve to stay stranded forever.
So the bushes rustle, and Boone says, "Vincent?" a bunch of times, but as it becomes clear that it's not a dog, Locke pulls his knife. And what to their wondering eyes does appear, but Claire! She stumbles out of the bushes, looking filthy and disoriented, not unlike a first-year college student after Frosh Week. It's too dark for me to conclusively tell whether Claire is indeed no longer pregnant, as some viewers are asserting, but isn't that the kind of thing the show would have made clear, so as to make this plot twist all the more, um, twisty? Or maybe they left it deliberately vague because they haven't yet decided where the story's going to go, since there aren't any new episodes, judging by the reaction on the boards, for the next four years.