The theme comes from Sonic the Hedgehog, released by Sega in 1991 for the Genesis and Mega Drive, where it plays during underwater sections when Sonic has only seconds of air left. Its short loop became one of the most remembered sounds from the series as the games were ported and replayed for decades. Online, players and editors reused the clip far beyond gameplay, pairing it with real life countdowns and near misses. The association is so strong that hearing it alone creates instant anxiety, which keeps it popular in memes and edits.