This sound comes from The Legend of Zelda: Breath of the Wild, where it plays when a Korok reveals itself after a small puzzle or environmental interaction. Breath of the Wild released in 2017, and its Korok hunt became one of the game's most remembered side activities because there are hundreds to find. Online, the cue spread through gameplay clips and meme edits as a shorthand for a cute, secret or easily missed reveal, especially when something small suddenly appears on screen.