Spoiler
I was on the lower level of Payiferen standing in front of the big switch facing the ladder waiting for the journey portal to appear. During my wait of about 15 minutes, I saw several vague shadows pass over the floor. I think that's normal. However, while waiting, I saw something on or under the floor. It was like something blinking on and/or off in several of the holes in the floor grating. It may be the real time rendering of the floor or there may be critters/bugs lurking down there.
Cal