>There is a fire tunnel where you take fire damage, metal
>heats up and drops, etc.
>
>There is a smoke tunnel where you take damage from poison gas,
>and can get poisoned.

I still have no idea what you are talking about. I just walked through the entire tunnel in the ashes of nowhere, the entire thing is fire, nothing dealing with smoke or poison anywhere.

So long, and thanks for all the fish!