I am creeping through a town and all of a sudden I hear a zombie growl, the same growl I heard when I was being chased earlier. Without thinking twice I stand up and start sprinting. I look back only to realize that the zombie was not even paying attention to me. Unfortunately now that I started sprinting 3 more zombies ahead of me heard me and now I'm being chased by zombies in an alarmingly increasing number. I run to the nearest fire station, in hopes of slowing them down enough to run out the back. Before I can reach it another survivor has had his attention caught by all the commotion. As I'm entering the fire station I hear a loud sho.... It would be nice if you guys implemented different sounds for passive and aggressive zombies. Thank you, that is all.