Both Arthur Ashe and Billie Jean King used these phrases ('playing out of ones mind,' or 'over ones head') to describe their performances while winning the finals at Wimbledon in 1975. ... The player loses himself in the action, continually breaking the false limits placed on is potential. Awareness becomes acutely heightened, while analysis, anxiety and self-conscious thought are completely forgotten. Enjoyment is at a peak pure and unspoiled.