When the first zombie woke up after a couple of months after his death, he realized that all his flesh was fetid and filled by worms, therefore he picked up the phone and made a call:
"911 what's your emergency?"
"He...llo I thi...nk I'm de...ad!" he said, trying to sound the more human he could "Co...me and get ... me!"
"Ha-ha-ha, very funny sir, we loved being pranked like that, I hope come alive soon, bye!" said the girl of 911 sarcastically, and hung up the phone abruptly.
The end.