The reloading callouts come from the Spetsnaz faction in Call of Duty: Modern Warfare 2, released in 2009, where multiplayer soldiers shout stock phrases while swapping magazines. A fan redub replaced those lines with the Japanese voice of Sasuke Uchiha, the brooding Naruto rival known for his cold, flat delivery, turning a routine combat sound into an anime crossover meme. It spread through soundboards and short-form edits where creators layer game audio over anime clips. Like other Naruto moments such as Mangekyo Sharingan, it survives because the deadpan delivery makes ordinary game callouts unexpectedly funny.