Rocky had a great morning. He kissed his girlfriend goodbye and planned to see her that evening for dinner. His day was just as good. As he was leaving work for home, he ran into his old boss, Genevieve. Genevieve said some things that made his blood boil. He was still thinking about the encounter when he sat down to dinner with his girlfriend. During dinner, he recalled how pleasant the rest of his day had been and his anger quickly faded. Explain that what concept does this scenario illustrates and why ?