The horn comes from Ed, Edd n Eddy, the Cartoon Network animated series created by Danny Antonucci that ran from 1999 to 2009 and followed the schemes of three friends in the cul-de-sac. Its slapstick sound design, full of exaggerated cartoon effects, made the show's audio a favorite of early meme editors and soundboard uploaders. The horn in particular became a go-to gag for marking fails and reveals, and it still circulates in edits, prank videos and reaction content that want an instant blast of old-school cartoon chaos.