As soon as the walker was down, Ellis rushed to crush its' head or pin the body with a large enough rock. The rock he finds is a ten-pounder at least, not enough to crack the skull but it could break the jaw and teeth...

Sorry sugar, but I ain't lettin' ya eat me, I have a damn District to help out, the mechanic thought as he dropped his weapon squarely on the zombie's mouth. He knows he souldn't take the sounds of cracking bone this personally but this is necessary. This is how Nick would go.