Its all down to Psychodynamics, programed thought and History of it. I remember a Kid I had cool as a cucumber, nothing fazed Him good Fighter. One night He had a Headache 20 mins before a Fight. I sensed there was something wrong, He admitted He was nervous, I relieved the pressure by manipulation. I asked Him did He get nervous before a Fight often, as He never before had shown signs of it. His reply all the time, He held His self together. Now this made me nervous, but that night the Kid went out,and gave the performance of His life and won the World Title.