Luffy and the crew were seriously desperate for any food, they had been stranded, trying to fish for the last 4 days, because SOMEONE- got hungry. And you know how luffy gets without food. So they all decided to stop on the first island in reach. Which was an all forest an island. They landed the ship on shore and walked into the forest as a group. Always having this weird feeling someone was watching them. That was until something popped out of the forest.