The Pack-a-Punch song comes from the Zombies mode in Call of Duty: World at War, where the Pack-a-Punch machine was introduced on the map Der Riese in 2009. Because that machine became one of the most iconic parts of Zombies, its jingle stuck with players across later Call of Duty games. Online, the clip spread through gameplay videos, remixes and short edits as a quick audio cue for powering something up, making a comeback or turning a weak setup into a strong one.