I used to be really bad about "snapping." I literally would black out and just beat the shit out of the other person. The last time I violently snapped I took a pool stick to some dude's face at a party...I don't even remember doing it or why. All I remember was him trying to push me on a pool table, maybe flirting, and I snapped. I was 14, he was 16.
When I snap, it's like, an eruption I can't control. In a way, it was such a relief to fight. I didn't have to hold anything in anymore, I could just let go. But at the same time, once I came back to myself, I would be so frightened! Sometimes I would want to KILL the other person! In that moment with my fists or object, I would feel a twinge of enjoyment from hurting the person. But I knew that wasn't me, the real me was opposed to violence. It conflicted me for years before I learned how to deal with my suppressed rage issues. Too bad I hate sports--my brother gets all his rage out by playing football, wrestling, and rugby!
I still "snap" but never with my fists anymore. I usually step away when I feel myself getting too angry--when party two refuses to let me leave I either explode or implode. Imploding seems to scare people more than exploding, lol.
Hell hath no fury like INFJ wrath.