I don't know if the game simulates magma accurately enough though, seeing as a lot of these guys who fall into the magma simultaneously drown and bleed to death. In real life, wouldn't you basically land on top of the lava and float, bursting into flames with all your skin burning to a crisp and falling off? You would die extremely quickly.
Yeah, buoyancy is yet-to-be-simulated.
One day, we'll be chucking goblins into the volcano and they'll just float over, climb out, and set stuff on fire.
So, 74% you're okay, 75% you're dead?
That's not DF, that's, I dunno, Final Fantasy or Minecraft or something.
Dwarf Fortress cares about not just simulating it well, but simulating it right. And for a game in alpha, it does pretty well.
More like, 75% and you'll definitely die, it's not totally exact.
But why is 75% the definite cutoff? Why should 75% coverage of 1st-degree burns be worse than 40% of 3rd? Wouldn't it be better to simulate WHY 75% burnage is lethal, rather than just say that it is?
I don't know if the game simulates magma accurately enough though, seeing as a lot of these guys who fall into the magma simultaneously drown and bleed to death. In real life, wouldn't you basically land on top of the lava and float, bursting into flames with all your skin burning to a crisp and falling off? You would die extremely quickly.
I think it's because mechanically, the flesh and stuff don't have melting/boiling point. However I've not twiddled with raw relating to it! That and buoyancy's not implemented, yet, but the not burning to death's a bit more noticible 
I think it's due to bugs in how damage is tracked, and that melting adipose tissue lethally exsanguinates one before one can perish of other means.
Exsanguinate is such a good word...