In Sophie Kinsella's novel "I Owe You One," the character Seb expresses a humorous thought about the potential for a remarkable speech from Obama during a hypothetical Martian invasion. He suggests that the situation would have been so extraordinary that it would have prompted an unforgettable address from the former President, reflecting Seb's playful imagination.

This quote encapsulates the lighthearted tone of the book, emphasizing the whimsical nature of the characters' musings. It shows Seb's desire for excitement and the importance of the unexpected in life, which resonates with the themes of taking chances and embracing the unpredictable journey presented throughout the story.