Meditation Diaries: What does living in the moment really mean?

Something I still don’t understand about living in the moment. Say you’re Angry at someone and your knee jerk reaction (a knee jerk reaction by definition requires no thinking)! is to slam that fucker in the face, aren’t you technically living in the moment, isn’t this a moment when smashing him in the face is the ultimate act of living in the moment?

I mean you aren’t thinking about it, you aren’t considering the consequences whether they be positive or negative, you’re literally living in the moment and letting your body react without thinking, your Fist is at his face before you even consider anything. Surely nothing quite encapsulates living in the moment than that? Yet obviously this is not the good thing to do, and so we teach ourselves not to.

So all this living in the moment stuff, isn’t it actually not living in the moment?