The sound comes from The Marvelous Misadventures of Flapjack, the Cartoon Network series that ran from 2008 to 2010 and followed Flapjack and Captain K'nuckles. Clips of Flapjack's shrill reactions circulated on YouTube and soundboards as a scream meme, and editors began bass boosting the audio to exaggerate the distortion for comic effect. The boosted version became a staple of short meme edits and reaction videos, valued because the familiar cartoon yell is instantly recognisable even when the picture is unrelated.