Singer Rick Springfield plays a montage of clips from various TV/Movie shows that features a character singing Jessie's Girl, right before he performs the song in concert. The clip of Finn singing the song from this episode is featured in that montage.
Having had his Mohawk shaved Puck compares himself to Andre Agassi as a man who lost his strength with his hair. In reality Agassi was bald throughout his tennis career and wore an extravagant wig in his earlier wins, rather than actually having any hair.
When Rachel (Lea Michele) is talking to Lauren Zizes (Ashley Fink) in the stairwell, Lauren stops when a male teen starts to walk up the stairs and says, "Who's this guy? Who's this guy?"
This is a parody of the same thing that happened in the movie Casino, when Joe Pesci's character says it during a scene, when an unknown extra, walked into the shot.
Puck approaches Mercedes at her locker and opens a conversation with "So what makes Super Mario Brothers 3 so amazing was the Star World. None of the others had anything like that." Super Mario Brothers 3 has no star world; instead, it is Super Mario World that has a star world. Super Mario Brothers 3 is a game for the "Original Nintendo" gaming console, while Super Mario World is a game for the "Super Nintendo" console.