A Smokey Intersection                                  -      N      - 
(-------------------------------------------------)     W <---(M)---> E
                                                        -      S      -

As you enter the room you are emeshed in a thick smoky fog.  The place
reeks like rotten eggs as the smoke from the two bellows on your right and
left pour out massive quantities of smoke into the room.  The smoke floats
up through a large ventilation shaft cut into the ceiling.  Your eyes begin
to water as you try to make your way through the room to some fresher air.