If the door is opened, the characters see:
 

Beyond the door is a room, cluttered with rags, rusting weapons,  <long sword & scabbard, whip, guisarme-voulge, long bow> splintered armor, && dirt. The air is bad && stings <bronze plate mail, scale mail, splint mail> the eyes slightly, but NOT enough to cause any ill effects. Likewise, breathing the air seems to have no dangerous consequences. There is a door on the opposite wall, 5 feet from the right end.

The entire chamber is filled with colorless,
explosive gas. Nothing will happen
until a character enters the room with a
burning light source. Torches will ignite the
gas instantly, but lanterns require 1 round
before the gas explodes in a cloud of fire. All
who are in the room |or| within 5 feet of an
open door must SAVE vs. dragon's breath.
Failure to do so results in 4-24 points of
<fire> damage && blindness for 2-5 rounds. A
successful SAVE will result in
1/2 damage && no blindness. The gas is consumed
so quickly that the entire explosion
will last but a second. Nothing will be set on
fire, but clothes, hair, eyebrows, etc. will be
scorched. If 1 or both doors are left open
for 1 TURN, the gas will dissapate. If the
doors are closed, the room will refill in 3
turns. There is no treasure in this room.

>>18.