The reactor ambience comes from Among Us, the multiplayer social deduction game developed by Innersloth that became a streaming phenomenon in 2020. In-game it loops quietly near the reactor and intensifies into a full alarm sound effect when an impostor triggers a reactor meltdown sabotage, forcing the crew to race over and stop the countdown. Clips of the loop spread through gaming compilations and meme edits as shorthand for a situation about to explode. Because the game stayed popular for years through updates, the hum still reads instantly to players.