Strange thing I noticed in Kino

[DEFCON 1]

When you spawn go up the set of stairs on the right, open the door and go over to the next room where the portaits are, go to the barrier and look at the left side of the wall and look down a tiny bit but keep looking at the wall, you should see Shoe marks that are made in blood and it looks as if someone was walking back and forth ON the wall. This is a little wierd because I'm pretty sure humans and zombies walk on floors not walls and gas zombies don't wear shoes. Does this mean something or is it just a random decoration treyarch put in the map. Post your thoughts and sorry if this was posted before.

[InfestLithium]

Kind of creepy, now that you mention it. I can only think of three possible solutions:

1) It's a decoration (like you said) to give Kino that "mysterious" ambience.

2) It may have to do with Hidden Person. You have knocking and screaming...could it be from the same person?

3) It WAS a Nova Crawler, however, it still resembled a Vril person before completely becoming mutated/zombified.