Flow is optimal achievement. According to Mihaly it requires the performer to fully engage  with an achievable goal using her performance skills. She focusses on the next part of her decomposed goal. Suspending disbelief and throwing yourself totally into a performance takes courage. Such total commitment may seem reckless to others and can bring jeers in the dressing room before a performance, but seldom after a personal best has been achieved. Flow is absolutely competitive and exposes the weaknesses of others who are less committed and less practiced at achieving their goals. My novel Time is Gold has a runner in Extreme Flow break a world record.  htpps://martinknox.com