I don't remember where I saw this video first, but recognized that pic and found it again: www.youtube.com/watch?v=Jom... (it makes more sense if you read the description)
This is "Woozy" if I'm not mistaken. This happens after you swallow the firefly whistle and input the code. When you leave the Fireflex Room you go through this with a buff called "You're Feeling Woozy". Source: I have two alts that went through this, plus myself.
As featured in the Fireflex 3000 quest (2:21 into it): www.dropbox.com/s/9n2ycbsen...
The Outer Mind in the Gwendolyn Quest just led onto the Inner Mind before returning you to Gwen's chamber.