The Medbay scan comes from Among Us, the social deduction game by InnerSloth released in 2018 that became a streaming and video phenomenon in 2020. In the game, crewmates can complete Submit Scan in Medbay, a visual task that lets nearby players see the scan and confirm the player is not an impostor. Clips of the task spread through gameplay videos, streams and short-form edits, where the sound became shorthand for a trusted crewmate. It remains popular because it is instantly recognisable to players and works as a clear, low-key signal of innocence.