The deep gulps of air and fighting back of tears as Michael Phelps stood proudly upon the podium as US anthem the Star Spangled Banner rang around the Water Cube said it all. It is a sound the 23-year-old American swimmer knows all too well. After winning the Men's 200 meters Butterfly final -- Phelps's fourth gold medal of the Beijing Olympic Games, each on a world record time -- another superlative can justifiably be added to the growing list of adjectives used to describe this amazing athlete