I just got my first fort death... a first-wave immigrant, High Master Cheesemaker, called Rimtar Kivishlorbam. I was a little interested by him, because I heard that you could make cheese, but I didn't have any milkable animals at that point so I set him to random odd jobs. I breached the underground cavern, and set him to collecting silk. It took me about a season to realize that it wasn't just Cave Spider Silk, it was Giant Cave Spider Silk, but the spider didn't show itself so I thought it was fine. Obviously, I was very, very wrong.
One fine day, when my fledgling military was preoccupied with a troglodyte attack, I got a message:
"Rimtar Kivishlorbam cancels Collect Silk: Interrupted by Giant Cave Spider."
I immediately zoomed in to his location: he was in a far corner, webbed and fighting with the GCS. Seeing as there was no one else there, and that he was bleeding heavily, I walled up the entrance. Hey, he'd just bleed out in a bit, wouldn't he?
As it turns out, no. I didn't even realize he wasn't dead until I noticed I hadn't got his death announcement yet -- I had even got his tomb planned out. So I zoomed in and... Both his hands had been reduced to a pulpy mess, his right kidney and liver were shot, and his heart was giving out too. There wasn't a single part of his body that didn't have at least a yellow wound. He'd been webbed but the spider bites couldn't go through his pig tail clothing. Amazingly, he had gone from no fighting skill whatsoever to legendary fighter and dodger, and mangled a spider leg (red wound, but the important thing to remember is: All Spiders Have Eight Legs). I quickly tore down the wall and sent my (very, very green) military at the spider. In the rescue attempt, one immigrant hammerdwarf was webbed and strangled.
This is how I imagine Rimtar saw things. He'd been fighting off a Giant Cave Spider for two months, with no rest, no food and no water. He was reduced to trying to bite it; he spent all his energy dodging and trying to hold on to life. He watches as the rescue squad cut the spider neatly in half, but not before a hammerdwarf sacrifices his life for him. Just as they cut him free from the web, he breathes his last, and finally,
"Rimtar Kivishlorbam, Cheesemaker, has bled to death."
I was pretty upset. They ate the spider in revenge.