It doesnt matter how it ends, the jow of battle exist for many of us. Onlike shooting people ,fighting is mostly ensured when someone in the party usually does something that the other individual disagrees on. Irs personal and leads to them hating each other and thus fighting is the only solution. They are probably both feeling like shit but it can come out of nowhere the thrill of fighting one another. I myself get hyped if i fight with my friends for fun but when i get in a real life i usually feel like shit but still that hype is still in me. Its sick to kill people, violence is not the answer but the thrill is something many people cant control over. Again if you get pleased of people being in pain then you are sadistic but in this post i belive it can also mean pleasure of power or in fighting