It isn't a part of what makes Dwarf Fortress the game it is until we've done three things:
Dissected it molecule by molecule, learning all there is to know
Made megaprojects out of it, just to please Armok himself
Built it on top of the circus freak's heads.
------
So we need to do all of this. I can imagine being just so ready with your one supersonic cart, tearing a hole in the big top's roof, and sending the cart down into clown town for massive carnage.
That, and I'd like to see other ideas for "megaprojects" and the like. For instance, making something in Fortress mode inaccessible without taking a ride (the most epic ride possible) then tackling it in Adventure- I think DFhack can stop items from being thrown about by the angry wild badgers.
Such as a large pedestal that can't be scaled. After conquering the fortress, you find a minecart in the deepest part that can be ridden, then outright launched out of the fortress, onto the pedestal, where a prize becomes yours.
Basically, this isn't a "how to" thread, I've seen like three. This is a "what to do" thread.
------
Ideas so far:
Hallway to Hell
Make your main entrance super inviting to the goblins. Trigger a minecart to launch when they enter, and use the hallway as a railgun barrel.
Adventurer Secret
Pedestal or secret area made by minecarts.