While this approach works best with dwarves, I believe you are wanting a little thing called "The Lever".
The Lever must always be referred to as The Lever. The capital letters are non-optional.
The Lever will, when pulled:
- send a signal to every floodgate, machine, drawbridge and repeating spike trap in the fort (with one pull, no setting The Lever to repeat. If you are respectful to The Lever, only one pull is needed.
- collapse the ceilings of all food and booze stockpile areas, but NOT destroy the fort.
- destroy every coffin in the fort
- release all caged badgers, untamed dragons, elephants, zombie carp/sturgeons/whales, fully equipped goblins and megabeasts/FB's
- set any flammable parts of the fort on fire
- set the area around the fort on fire
- fire a yak at a noble
- set the world on fire
- collapse a vast pit from surface to HFS across the map from the fort, thus dooming the ENTIRE WORLD to a terrible end. Bonus points if a caravan of elves gets dropped into Clownland this way.
- nearly or completely seal off the fort about a third of the way down the inhabited levels.
- spread gnomeblight and/or FB extract and/or kitten limbs across the valley/whatever.
Instructions:
1. Set up The Lever
2. Pull The Lever.
3. Keep the fun going as long as possible, with barricades, temporary walls and last stands.
4. Tell us how it went. Include screenshots.