IllegalPaladin on 25 August 2007
The one area where I noticed it (and could make it drop) was underground in the large room where you fight the Chimera right before you meet the first Angel. When the tunneling machine comes through, I noticed the frame rate drop a little bit when you get up as high as you can in the room and look around. I don't remember where another area was, but I know I was able to do it where I just mentioned.
