I was thinking; maybe DF should include more mundane accidents. The game has a lot of semi-random challenges: attacks from the river, chasm, and lava, spider bites, sieges, sparring injuries, noble demands, etc etc. But maybe the everyday lives of the dwarves should have accidents too, to keep things interesting. And of course accidents should be much less likely across the board with high-quality buildings/objects and skilled workers.
"Hot" workshops like wood burners and smelters should have a chance to catch fire during use... though obviously not until there's a reliable way to put fires out. Good reason to store your wood elsewhere!
Unskilled workers should have a chance to completely botch the job, ruining the materials. Good reason to keep your wannabe jewelers from encrusting with diamonds!
Stills should sometimes spill barrels of booze out onto the floor that would spread around like vomit or blood does.
Alchemist laboratories should blow up or release miasma. Animals to be butchered should be able to break free and go on rampages. Clothesmakers should screw up sometimes and make Large or Narrow garments. Anything requiring a mechanism should jam once in a while and require a mechanic to come fix it. With the new water flow mechanics, floodgates should leak a little bit of water occasionally.
Any other goofs you can think of?