How many people jumped into a karate stance when they saw the planes hit the twin towers?answer none!!!!!
They did a natural flinch response/fright reaction.It does not matter how you train,it is impossible not to do the fright reaction...it is inbuilt...hard wired.
How many people practice mindfulness? How many people regularly meditate? A buddhist monk can set himself on fire and not flinch. "When the mind is mastered even the flames seem cool"