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.
Laugh now creature, for in an hour's time you'll be foaming at the month and convulsing like a dirty... monkey? Muahaha!
"All the little kids trick or treating got freaked out by my face. I considered my goal accomplished."