My fortress exists currently as a hill camp (only one z-level deep), with an entry way to the mega fortress i am digging out below. We are roughly 115 strong, and had a surplus of metal bars, especially gold. Things have been progressing smoothly. We had two vampires migrate, who were promptly sealed into the walls to be used another time, and one ambush of ranged goblins which was painful as we have no real doctors.
Then the dragon showed up. Having spent long amounts of time planning the megafortress, i was really not happy with this occurrence. My dwarves are not well armored (none) and i expected this to be the end of my fortress. Then the elves came to trade. Interesting...
As the dragon neared the entrance to my fortress, where the trade depot is also, i pulled in all my civilians and walled up all but one entrance. I set my military into a ready room (~4 squads of 6-10), preparing to charge our last charge to defend the fort. I got to see my first roasting, and it was an elven roasting which was all the better. Then it suddenly stopped. I saw an elf limping away, apparently unhappy that his friends just got fried and not wanting to trade anymore. I couldnt find the dragon though. I looked around, even checking on stonesense since i thought it would be easier to see. Nothing.
I looked at units, and it was still there, but now his type was "Caged Visitor" or something like that. Sweet! Somehow my front door cages had caught him. I checked the combat logs and noticed him vomitting while roasting elf donkeys, but i dont know how he became stunned.
This fort just got WAY cooler. My wife wasn't as impressed when i spun my chair around and forced her to give me a high-five.