When I was in training to be a Keeper (don't ask) I went through a test where I had to sneak up on one of the instructors. It was a room where there were beams lining the ceiling with a light behind them so a patch of shadows was thrown across the floor. Now I'm moving up on a rat-thing in Constantine's domain and I'm going through a pattern of shadows that is the same as the ones in the test. I'm definately going to have to find some Keepers and ask some questions once I'm done here.