Despite all the qualities the gameplay of Dark Souls has, and fairness it gives each death (I mean: the gameplay is so tight, if you die, it's usually your fault), it's not perfect. You do get some deaths once in a while that are just total bs and through no action of your own could you have changed the outcome.
I was leveling a new toon for PvP once, going through NG and NG+ really fast to get him done as quickly as possible, and human at the same time. I figured, if I get invaded, that's just more souls for me! And for the most part, I was right. Was undefeated against all my invaders until I got to the Demon Ruins in NG+. Maybe I'd gotten over-confident, but I just think I expected too much honor out of my opponent. I was at Stray Demon's door when he spawned, but I figured I'd wait for him. In return for waiting, I expected a fair fight. My mistake... He DMBs his Katana, I wield my naturally aspirated PGS+15, and first thing he does is go straight for the lagstab. Long story short, the fight ended in a draw--we killed each other at the same time. At this point I was carrying 30+ humanities or so (I like to have 99 humanity on my PvP toons, so I raise my humanity while getting to SL120) and had enough souls for about 10 levels (I wasn't decided about where to spend my souls, so I'd saved up a few). On my way down to the bloodstain, maybe I got over-confident again, but here's what happened: I run down the stairs dodging all the fire-jabbas, roll under the Taurus's DGA, and get staggered by the Taurus... I'm not sure how. Anyway, next thing I know, before I've regained control of my staggered character, I GET SWALLOWED BY THE CHAOS WORM.
There go my 30+ humanities and 10+ levels.
I've lost 99 humanities at once before, and millions of souls, in even more serendipitous manners (a quit/ load glitch), but that might be the death that's stung me the most. Just because I was killed in a draw-match between me, with my PGS+15, and this lagstabbing Darkmoon with his DMB-Katana, and then insta-killed while I was dubiously stunned on the way to getting my bloodstain.
Anyways, I'm over it now! But I was not pleased by that insult over injury double-bs death!