What is it then?
You have a firm understanding on this concept and it’s fair to assume you’ve never experienced it as I doubt you’ve killed a person.
For you to talk in such detail and affirmation about an experience that you’ve never experienced I can only assume that you’ve researched the matter in scholarly articles? Otherwise you’d be just talking out of your ass. Any links to the sources so the uneducated like myself can follow your foot paths to understanding this matter without having a first hand experience of killing somebody in a heat of the moment?