The vent sound comes from Among Us, the social deduction game developed by Innersloth that surged in popularity in 2020 through streaming, memes and short-form edits. Players strongly associate it with the Impostor using vents to travel and avoid detection. As the game spread online, the audio became a quick shorthand for suspicious behavior, stealthy entrances and disappearing acts. It is still used because even very short edits can communicate the joke instantly, much like other familiar Among Us audio cues.