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.
Tour Guide: I direct your attention to this ancient and mysterious tablet, which has yet to be deciphered. Leela: Do you know what it means? Fry: Yeah, I asked a cop once. It means "up yours kid."
"This man was in the drive-thru at a tobacco store on a riding lawn mower, towing what appeared to be his mother in a rocking chair and a night gown. It's a miracle I was able to capture this on film."