I mean really randomly, like exceptionally odd behavior.
I had a miner who didn't seem to be particularly unhappy, though he was disgusted by various goblin deaths in recent memory, he had lots of happy stuff in his thoughts as well.
He's got a royal bedroom, nice office and dining room as well.
So imagine my surprise when I see him on top of the chambers where the magma pumpstack dumps into the area around the fort... only to have said surprise enhanced when he decided to climb down through the fortification and take a nap in there...
I'm not sure if he'd be able to climb back out, but I used the gm-editor to change his position outside of there once... this was actually before he climbed back in to take a nap, now that I think about it... So I moved him over to the farms this time, when he woke up he wandered outside, roamed along the fortifications lining the above ground magma reservoir, then came back and started clambering around the fortifications around the military training area/main entrance:
I don't even know how he got up there, I'm pretty sure he was down here on the ground underneath them originally:
So he clambers around the outside edge and heads over towards the entrance, I figured he was done with his "let's play jungle gym around the magma" fun...
That's a block wall he had to climb to get up there.
Then he must have noticed the nooks where I autodump the elf diplomat corpses and decided to go sit on one?
Again, clambering around on the outside of fortifications, shimmying up block walls, the area which the magma pumps dump into is smoothed natural stone as well.
Then I lost track of him and while looking found this guy who was annoyed at sleeping on the grass recently:
I watched other dorfs go over there to grab stuff, right past him, and head back, so I know he
can path back to the fort and his royal bedroom... he just choose not to?
Oh, I think I found mr. spider-man... wait, does he have a kindred spirit here?
What the hell?
They aren't talking, aren't getting closer to each other, aren't on patrol duty, aren't gathering items, have no job listed, aren't showing up as being stressed or crazy or anything, they're just off-duty military dorfs deciding to go climb sheer walls for no reason and hang out up in the north end of the map?
Oh, I didn't get a screenshot of it, but I watched mr. spider-man climb down into the fort through what should be a wagon-only ramp access route, so that's no longer a valid defense strategy apparently.
Yes, he is a legendary climber, but I've never even seen a cat do this stuff besides the wandering around while hanging off of block walls.
The only thing I can think of is that I had recently flooded the map with magma and this all started happening about a month or so after it finally dried up enough to let the dorfs have free reign of the map again.