Elrond's mouth (shot from behind) doesn't match his words, when he says, "You gave him everything he wanted and then thanked him for it."
While Nori and Poppy are hiding from the trackers, they are menaced by a rattlesnake. While Tolkien's geography may be variable at times, it is given that "Middle-earth" is intended to represent what we term the "Old World". All species of rattlesnakes are native to the Americas.