I still haven't gotten the basics down quite yet of the whole game, and I was trying to figure out how I might go about throwing caged enemies into my volcano. I can't seem to get the cage anywhere else from the trap except to dump it, so I had an idea. I'll build a floor over the caldera only linked to one support, have the support linked to a lever, and a dump with only caged enemies marked for it on the floor. That way, pull the level, section of cavern collapses into the volcano!
It took much trial and error to actually get the floor not connected to anything but the support (Floor is still linked to upstairs...) So I had the one floor tile deconstructed but Urist McMiner refused to deconstruct himself on the stairway. Over and over again I tried until finally, I just decided to test out my contraption anyway. I pull the lever with Urist still on the floor.
It worked! But something strange happened...
You have discovered a great magma sea.
You have discovered a magma pool.
Raw adamantine! Praise the Miners!
You have struck *insert rock here*! x14 different kinds
You have discovered an expansive cavern deep underground
A section of cavern has collapsed!
Urist McMiner has bled to death.
Then I follow the volcano all the way down as suddenly I am now able to and at the very bottom lies Urist McMiner. He made it all the way to the bottom of the magma sea before bleeding out whilst discovering everything he could on the way down.