sentences:  A common gag, especially in the later seasons of the show, is the extremely low quality of the food served at the restaurants, a parody of common beliefs and urban legends surrounding American fast food.Documentary filmmaker Decland Desmond has made several exposes on the chain, revealing practices such as stapling together half-eaten burgers and serving them to new customers, and substituting all manner of cheap filler as meat.Krusty also reveals that the Ribwich was made of an unspecified animal with more than four legs, presumably some sort of insect or spider, that was driven into extinction by its production.