When Rogan steps back and off the pressure plate (leaving only Jango there), the door swings closed very quickly and very quietly. Obviously it requires more weight than just the young elf boy to open it... but as the elf couldn't weigh more than probably 130 pounds, you don't know if a heavier single person could open it on his own. When Jango looks on the other side of the doorway, he suspects that the floor holds the same sort of pressure plate, so the door could open from either direction if enough weight was put on it.
You also notice that the door opens fast enough that a person walking to up to it could pass through the threshold without having to slow down. A person running would have to wait a beat for the door to swing open, but if they were moving at a normal clip, it would not hinder their progress at all.
[sblock=Ari]As you are still standing at the end of the main hall while Rogan and Jango are futzing with the secret door at the front, your eyes and ears catch two things from down the hallway. First, you hear a deep grunt or two from someone or something that is not the person chanting. Almost like the sound of boredom or of a sigh, but very much a vocal bass.
When you glance down the hallway, you then see a rather large shadow get cast on the northern wall down at the end where the chamber is. It's hard to tell if the shadow is big because the person/thing making it is big or if it's just the person/thing is further away from the lightsource that is casting it... but as the shadow is moving, the person/thing casting it definitely is mobile and has just moved in front of the lightsource (since the shadow hadn't been there previously).
You cannot tell if the grunts and the shadow are related.[/sblock]
[sblock=Khalia, Horatio]Both you you please roll Spot checks for yourselves (using ww.invisiblecastle.com).
When you post your results, if you also mention in the post something specific you are glancing at or a specific direction/location you are looking, you will get a +5 to your roll if it is the same thing I'm having you make your check for to notice.
(If what you post is not for what I'm having you trying to notice, your Spot check will be just as normal.)[/sblock]