First of all, welcome to Kenpo Talk. Good to have ya here. You ask a very interesting question. I've had similiar experience, pulling off self-defense almost without thought twice. Since then, I've goofed around with buddies or coworkers and have found out that the more I train, I also have to "restain" my automatic responses.
"I used to think the brain was the most important organ in the body. Then, I thought "Guess what's telling me that?!".