Bad Piggies is a physics puzzle game released by Rovio in 2012 as a spin-off from Angry Birds, putting the series' green pigs in charge of building rickety vehicles from scrap parts. Its cheerful theme music became closely linked to the pigs themselves, and clips of it spread through gaming videos, memes and soundboards as a shorthand for a silly plan. Because the tune is instantly recognisable to players who grew up with the game, it still works today as a nostalgic cue for cartoon chaos and doomed inventions.