SMG4 is the long-running Australian YouTube parody series created by Luke Lerdwichagul in 2011, built around Mario characters in absurd, meme-driven stories. Boo, Nintendo's shy white ghost enemy, has been a staple of Mario haunted levels since Super Mario Bros. 3, and its giggle became a recurring audio cue in fan edits and SMG4 episodes. As SMG4 clips spread across YouTube and soundboards, that short laugh was isolated as a reusable reaction, kept alive by gaming editors who need an instant spooky cue.
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A short ghost cackle from the SMG4 Mario parody series, this Boo laugh is used for spooky reveals, jumpscares and playful villain moments in edits.
A 0.7 second burst of mischievous ghost laughter, the SMG4 Boo laugh is a high, echoing cackle that lands instantly. It sounds like a classic Mario Boo giggling right behind you, cheeky rather than truly frightening, with that rounded, bubbly tone fans recognise from haunted levels. In a video it flips a moment from normal to sneaky in a heartbeat, signalling a character is plotting something, sneaking up, or enjoying someone else's misfortune. Because it is so short and distinct, viewers get the joke without any setup, making even a still image feel animated and haunted.
