This wasn't mine but my brothers for whom I was gming, but the party was in the sewer system of a large city, trying to escape from something evil they had awakened. An rough bad luck and a few bad rolls, one of them, a warrior wielding a greatsword, got separated from the rest of the party ... And found himself in a corridor alone with nasties that outclassed him bearing down on him. He still had a chance to turn and run thou ... But instead turned and fought, making a delaying action to let the others get away ... And then proceeded to have one of the best strings of dice luck I had ever seen. When the rest of the party, who had decided to double back and try to find and rescue him caught up ... They found him dead, yes - but dead with the corpses of four of the nasties around him and one heavily wounded - keeping in mind that facing one of these things as a party was a very tough encounter. They managed to finish off the remaining one. And, while it took some time and questing - they did manage to eventually get their companion resurrected. And his badass credentials were through the roof.