Someone mentioned massive out-of-control fires last page, and I just thought I'd mention-
A couple of ingame years ago my fort, Koshid, which is partly above-ground, was horribly damaged by a massive fire that broke out in the forge, killing a few of my dwarves and damaging artifacts.
Anyway, I noticed much later, that JUST as the flames were spreading across the map, one of my old enemies, the goblin snatcher who had stolen one of my fort's first babies, had been sneaking in.
I found his engraved silver dagger lying in a pile of ashes by the river.
Awesome!
Also, I still have a !!XXTame live roachXX!! listed in my animals screen from that incident, for some reason.
In more recent news, the massive goblin siege has been broken, unfortunately by a combined attack of two very-deadly forgotten beasts, one a giant teal-coloured finch with a horrible paralysing syndrome and the other a sardonyx (?) quadruped, with very nasty kicking-skills. They slaughtered the goblins, at least.
And I got rid of the one remaining straggler, a goblin maceman riding an olm outside my front gate.
Annoyingly, my greatest warrior, Beryl, had his arm apparently TORN OFF by a ghost. WTF?! Damnit.
But, this being Beryl, The Held Odor or whatever, he simply strapped his shield onto his axe-arm and got on with killing shit.