Giant worms lived in Coruscant's undercity, and once were the object of a particularly dangerous racing wing stunt by Anakin Skywalker. The object was to retrieve a scale from one of the worms, who lived in a spot that was particularly difficult to access by racing wing. Skywalker, then merely a young Padawan, failed to negotiate the distance correctly, and had to be rescued from the worms by his Master, Obi-Wan Kenobi.