You press your face up against the mirror and attempt to push through. Unfortunately, you come out the other side of a the mirror facing the Corridor of Blood once again.
Not to be deterred, you walk back down the hallway the same way you came through in the first place. You hear grumblings around you; the ghosts seem unimpressed with your cloak swishing, on this side of the mirror.
You decide to make a left turn at the first large, solid milmwood door. Grabbing the brass handle with your grasping hand, you notice the name inscribed on the gold plaque reads "Do Not Enter". You consider this for a moment, wondering who this "Do Not Enter" person might be, and if they'd permit you and your striking hand within their personal space.