Cartman introduces himself to the Border Patrol officer als 'Eric T. Cartman', a reference to the character of Sheriff Buford T. Justice
A "Dias De Mantequilla" shrine can be found in Butters' closet. A "missing person" flyer for "Mantequilla" can be found near City Hall.
Randy walks outside to find the street completely covered with leaves and cries "Nooooooooo!" in James Earl Jones' voice from the end of Star Wars: Episode III - Revenge of the Sith (2005)
Butters wakes up naked, opens the shutters and like Brian, he is greeted by thousands of cheering followers on the streets.
Title is referenced and main theme from the score is used.