Why Michael Phelps Was Laughing During the National Anthem

United States' Michael Phelps celebrates after winning the gold medal in the men's 4x100-meter final during the swimming competitions at the 2016 Summer Olympics, Monday, Aug. 8, 2016, in Rio de Janeiro, Brazil. AP Photo/Martin Meissner

Michael Phelps is having the time of his life—it was written all over his face.