So on my 2nd playthrough of ME2, I noticed something while going through Arrival. When I was running by the doors in the wall in the room with the elevators, something flashed up really quick. It was nearly impossible to get it to appear again, but I had to check again to see what it was. The way it popped it, it seemed like from a particular angle I might be able to open the doors! After trying for many, many minutes, I finally got a screenshot and saw what was popping up.
http://img.photobuck...er/Prisoner.jpgWas there originally going to be a part where you let out other prisoners or something? BTW I was an Engineer, so I tried to spawn a Drone inside that room to see if I'd get a reaction. The Drone did not spawn inside, sadly.

And of course there is no way to talk to this prisoner. I just thought this might be some content that was not finished in time for release.