Question 123: Freezing

I was walking with my girlfriend, when all of the sudden her ex boyfriend came toward me cursing and yelling, and threatening to fight me. I had been training in the martial arts for years but my adrenaline kicked in and my mind was so cloudy that I could not think straight, it was as if I had totally forgotten my training. I felt scared and shaken at the time, but later I was angry because I didn’t think to use my skills. Is there any way for me to learn to control the adrenaline rush that makes me feel so anxious, scared, and nervous?