Sonic.EXE began as a horror reimagining of Sega's Sonic the Hedgehog in online creepypasta stories, where the cheerful mascot becomes a demonic entity haunting a corrupted game cartridge. Fan-made games and YouTube playthroughs turned that idea into a recognisable jumpscare figure, and his twisted laugh became shorthand for the character itself. It still circulates in horror edits, meme videos and reaction clips because it instantly tells viewers that something familiar has turned sinister.