The alert sound comes from Metal Gear Solid, the 1998 PlayStation stealth game directed by Hideo Kojima and developed by Konami. When guards spot Solid Snake the game enters alert mode, marked by this sting and a red exclamation point above the enemy. Players heard it constantly while learning patrol routes, making it one of gaming's most memorised cues. Clips of the sound spread through forums, YouTube edits and streaming culture, where it became shorthand for being discovered in any embarrassing real life situation.