"Urist, the enemy is entering our deathtrap airlock pillbox in huge numbers! Get ready to raise the bridge at my command!"
"...raise?"
The subtle disbelief and growing rage you get when you pull the all-or-nothing lever and see the bridge, that your entire strategy is hinging on, vanishing instead or raising.
Dear god. I tried to build walls everywhere to contain the 50 or so goblins as well as possible and channel them through my barracks first. They werent quite in yet, not even in the airlock, but there was so little time left. And soldiers heading off 100 z-levels down to the adamantine facility to drink something didnt help either.
Total chaos ensued. I work with quite restrict burrow assignments (also why do not activate burrow alerts), so that people do not enter certain areas where they have no business. In order to build walls in the barracks I had to adjust the civilian burrow - which, combined with my sudden lack of oversight due to me following the actual combat, led all kinds of people try to fetch some thing or other. Hauling new cages for the traps that approx. 10 more enemies are standing on, eating at the soldier's dinner tables, retrieving x(socks)x.
Out of my marksdwarves, 2 showed up on the battlements. Thankfully, there were still my adamantine clad (although not terribly experienced) melees. I couldnt really follow what was happening what with all the body parts flying around, but in the end I lost only 3 soldiers and several are wounded although probably not badly.
At least I've found the gaps in my defenses... of which there are quite a few.
Kids, always double check you build the right thing. And always try pulling levers to see they are connected properly before you enter a serious situation...