I came up to a city and had no weapons and figured I would try to out run the zombie behind be. I wound up running into several other zombies in the town when I decided to run into a building so I ran up to one with the doors open, ran in turned and shut the door before they made it in. about five seconds latter on came right thru the wall to my left and another thru the door in front of me. I then made it up the stairs and into a room. I waited for a minutes and they did not follow me up. so I went back out and down and right past them out the front door one was standing out side I saw when I shut the door to try to lock them in. so I started running away and after a minutes I turned to look and I saw a zombie go thru the wall on the left side of the house.