I don’t know why it gave me a memory of the server room at a building I worked at. If there was a fire, you had to leave the room immediately because the main fire suppression device was something that pumped all the oxygen out of the room, depriving the fire of the oxygen that allows it to burn.
Meaning, if you hung around in that room after the fire alarm went off, you’d have a good chance of getting stuck in there and dying of asphyxiation.