So I'm playing
Dwarf Fortress.
I get a migrant that's obviously a lady vampire masquerading as a normal dwarf. I decide to get rid of the vampire. I rig up a vertical spike trap, with ten receding spears that'll fire up out of the ground and skewer whatever's standing on top of them. I get the vampire to stand on the trap, then trigger the spears. She gets hit by all ten spears, but
does not die. I reset the trap, then fire it again. She gets skewered ten times again,
but still survives. She's got mangled and broken body parts from head to toe, but she's still hanging in there.
Holy crap, I think to myself, this is one tough vampire. I prepare to trigger the trap a third time, but then I had an idea. I'm gonna use her as a live training dummy for my medical dwarves. Her spine's broken, which means she'll never walk again, so I'm not worried about her stalking any dwarves and draining their blood. Instead, she's going to stay in my hospital wing, probably forever, to let my medical dwarves practice their suturing, wound dressing, bonesetting, surgery, etc. And if she does manage to recover from her wounds, well I've still got my spike trap waiting for her.