The sound comes from the Sonic the Hedgehog series, created by Sega, where underwater stages give Sonic a limited air supply and a musical countdown warns players before he drowns. That warning became one of the most stressful sounds in retro gaming, shared in countless playthroughs, remixes and reaction clips long after the original Mega Drive games. It survives because the rising tune is immediately understood even without context, making it a shorthand for running out of time in gaming videos and short-form edits today.