The Walking Dead S00 E78 Red Machete

"Fight the dead. Fear the living."

The series starts all the way back to the beginning, when the red-handled machete was just one item on the shelf of a hardware store as the zombie apocalypse began. A young man pulled the machete off the shelf and used it to defend himself from a walker. Unfortunately for him, he didn't actually know how to kill a walker and ran the blade through his assailant's stomach rather than striking at the monster's head.