Mine's a self insert who got exposed to over a millennium of isolation in minecraft, followed up by a transformation into a non-corporeal entity thanks to a turbocharged diamond portal. This was followed by a series of sanity-draining, trans-dimensional jumps. These ended at Steelhold with the creation of an adamant portal with the polarity reversed...
But before steelhold, my dwarf encountered swordthunders-one of the first fortresses to completely break the clowncar, if not the very first. Said fortress became a nightmare of lag, what with thousands of dead dwarves, uncountable items (if you looked at the stone stocks, the game would freeze up for about a minute)...many of which were glitched into hyperspace via the water flow glitch, and/or unmovable thanks to ownership tags not clearing. (A rather large chunk of the fortress was deliberately flooded with lava in the hopes of improving fps in the long run. )
Attempts to break the curse of swordthunders by giving away enough junk...failed; the merchants kept getting killed, leaving their stuff behind in the trade depot or scattered near the entrance.
Naturally, it imploded, and was contained only by a very elaborate self-reference scheme centered around the crundle leather tome of Das Ebal. Since I was the last person to complete a turn as overseer, it remained with me.
...
My dwarf has been pretty depressed since the bloodkin incident.