Interrogation room...

The hallway to our CCU has undergone a recent remodeling.  One of the renovations they made was to cut off the entrance to the bathroom from the CCU side, to reduce traffic from non-staff.  However, it leaves this room looking very strange.

What we have is a completely isolated, tiny tiled hallway, equipped with chair, fluorescent light and a small sprinkler head.  My idea was to waterproof seal the door, place someone inside and turn on the fire sprinkler.  Then we could ask them whatever we wanted while the room filled up.