Bravo Six is the callsign used by Captain Price in the Call of Duty series, and going dark is military shorthand for cutting radio contact to avoid detection. The line became a shorthand for disappearing on purpose, and gamers and editors began lifting it for montages, memes and short videos whenever someone slipped away unnoticed. Its appeal has lasted because the phrase is short, instantly recognisable to shooter fans, and works as a punchline even without any game footage.