Loonboon is one of the instrumental tracks composed by Laura Shigihara for Plants vs Zombies, the tower defence game released by PopCap in 2009. The track is associated with the game's mini-game and puzzle modes, where its frantic pace matches shorter, trickier levels. As the full soundtrack circulated on YouTube and gaming forums, Loonboon became one of the most recognised cues from the game. Creators later reused it outside gameplay as a nostalgic background theme for challenges, parodies and edits, keeping it familiar to players who grew up with the original release.