If your instructor is as nice as you say he is then its posible that he was testing her dedication or comitment. then again i wasnt there so i cant make an informed decision or comment on what the instuctor should or shouldnt have done. But what is this were not marines were martial artists crap, theres nothing wrong with doing extra exersise be it push ups or running the harder and the more we train the better we become. walking out during trainning or making up excuses is just a lazy undedicated weak way of thinking.