My family was rich and famous, or something, and we were trying to discretely ditch the people we were with to get to a deserted island. Unfortunately, the people running the tour didn't properly deal with some of their passengers, and I had to jump in and swim one of them to shore. Nick and I are at shore (a very small coral wall exists at the shore), and he finds this green translucent snail with a plain brown shell. He asks me why its green, and I tell him because it is. He asks a few more times, and I tell him the same. At some point the snail ends up on my leg and I feel a bite, I knock off the snail and I see a little white thing, which I instantly decide is a maggot. It now makes sense that the snail was not retracting when Nick was harassing it—it couldn't because its shell was filled with maggots.