Sounds about right, My...but I thought when I first read your Jenny post, and I've just reread it and I still think the same, that the doors to the room would be blocked.  Jenny was right there, with her hand on the knob, when the ceiling collapsed on her.  I can't see how anyone would be able to get OUT into the corridor to retrieve a fire extinguisher, if near the toilets is where it was.  Perhaps DTW needs to adjust his post slightly? Any chance there'd be a fire extinguisher in the reading room?