If you want to read a book on how your body will react to conflict situations, I highly recommend this book:

http://www.amazon.com/Meditations-Violence-Comparison-Martia...

It's not a book about fighting. It's about how your bodies mental and physical senses react to violent situations.

What you experienced is completely normal in violent situations. If you want to read a very good book on reactions and consequences of violent situations you should read this:

http://www.amazon.com/Meditations-Violence-Comparison-Martia...

Even if you've never been in a violent encounter, this book will help you understand how you will react. Keep in mind, you don't choose when you become part of a violent situation, violence chooses you.