SMG4, short for SuperMarioGlitchy4, is a long-running YouTube animated comedy series created by Luke Lerdwichagul in 2011, famous for its absurd Mario parodies packed with internet memes. This two-second scream circulates on meme soundboards under the fan-given name Leggy SMG4 Scream, though the exact episode it was clipped from is unverified. Like many SMG4 audio snippets, it spread through meme edits, reaction videos and soundboard reuploads. Its short length and exaggerated panic keep it in rotation as a go-to shock reaction.