I had a standard facepalm the other day. I had a great fort going with over 70 dwarves, when I decided to carefully dig down to the adamantine layer, because I didn't have any weapons grade metals available, and needed a military. I had a volcano fort, and a particular dwarf was causing trouble at the time, so I changed his profession nickname to "Sacrifice," built a bridge over the peak of the volcano, and dumped him in, immediately revealing the adamantine deposits at the bottom of the map. (It was also fun to use the new "follow" function to observe his plummet.)
I dug an extremely long winding stair from the very top of the map to the bottom, avoiding all of the caverns, and the very FIRST adamantine block I dug up immediately opened up a passage. So I lock in my two miners using the emergency bridge I set up beforehand, and watch as all of the demons pour in from below. In an all-too-dramatic scene where my last miner runs out of the staircase, I imagined him banging his fist against the raised bridge as the demons flood in and tear him apart. I then begin building an emergency atom-smasher to release the demons and kill all of them at once, and in the middle of this, a gremlin pulls the lever for me, releasing all of the demons into the fortress.
At this point I just sat back and watched the explosions. It was all very dynamic, almost like the demons were putting on a fireworks show.