I may be stupid for looking for any sort of logic in a zombie show but, it drives me crazy that the severed zombie heads keep growling and moaning... Pretty sure you need lungs for that.
Picture He was smart not to aim for the cup but instead hit that meaty flesh just to the side. That's how you do the real damage.
Picture One of the first rules to being successful in life is having a tattoo of me, Kenny Powers, on your body.