As you step through into the room, the light from your torch is entirely swallowed by the darkness and you notice the chamber is completely silent to where you can't even hear your sisters even though you know they're right behind you.  If you were to look back, you cannot even see the light from the hallway.  It is likely to be quite disconcerting to suddenly be deprived of your key sensory capabilities as you are engulfed by total mute blackness.