He is scared. Of course he should be since the dead are walking again and trying to eat him but that's not what scares him. He's scared of the noises that the dead, which are dubbed walkers, make. The moaning and groaning that escape their bloody mouths haunt his dreams at night. The scraping of their feet against the ground will be burned in his brain forever. He knows that the noises they make aren't the real issue but he can't help it. He'll always remember those god awful noises.