Final answer:
Homer's Odyssey does not specifically mention Helen mocking Greeks in the Trojan horse; it is a part of the wider epic tradition.
Step-by-step explanation:
In Odyssey 4, Homer does not provide a specific instance where Helen mocks the Greeks in the Trojan horse. However, the epic tradition suggests that Helen went around the horse, calling out to each of the Greek warriors inside by imitating the voices of their wives, which almost betrayed them. This event is associated with her cunning and deceitful nature, as depicted in other classical texts and sources about the Trojan War.