Advertisements Only read this since you are pretty sure it's not what's going on. And there are so many theories at this point unless someone tells me for sure it is, I'll assume you're wrong. Spoiler Also because IMO lobotomy is what they essentially do when they shoot/stab them in the face/head, no? They could tie one down and cut out the brain stem, which if I'm not mistaken, is the only part of their entire brain functioning. So remove it and zombie is "dead".