Zoro once again proving he is the perfect vice captain/partner for Luffy. Knowing how Luffy thinks and operates, recognizing that this island is full of people who specialize in "trickery" and it was going to be an issue for him is amazing. He has complete faith/belief in Luffy on most things but there's also an understanding that Luffy is not perfect just like everyone else. Nightmare Luffy has arrived! :)