 The opening sequence features Otto Mann in a Partridge Family @-@ like bus , while the chalkboard gag makes a reference to the film Inception . The Glee cast members sing a version of " Good Vibrations " by the Beach Boys . Krusty the Clown had a Super Bowl " nip slip " , appeared on The Electric Company and was seen using a child as a human shield in a similar manner to the character Greg Stillson from The Dead Zone . Lisa listens to This American Life , a public radio program voiced by Ira Glass . Also , Ethan and Kurt have a map of Middle Earth on the wall of their apartment . Krusty 's comment that " I ain 't gonna play Sun City " is a reference to Steven van Zandt 's famous protest song . 
