Butterballs/Trivia

Trivia

 * Matt Stone and Trey Parker's normal voices can be heard during the music video.
 * The promotional image of Stan's video is never seen in the episode itself.

Continuity

 * Butters assumes his alter ego, Professor Chaos, as a way to gain confidence and stand up against his abusive Grandma. Professor Chaos was last seen in "Coon vs. Coon & Friends".
 * In Stan's video, a boy holds a sign with "Bullying is so 2000-Late!" written on it. This quote is from "Faith Hilling".
 * This episode marks the first appearance of Grandma Stotch.
 * Mr. Mackey has faced his past bullies in order to cure his hoarding compulsion in "Insheeption".
 * Many South Park characters return since their last appearance in older seasons; such as Jesus, the Raisins Girls, the 6th Grader Leader, Dougie, Bridon Gueermo, the Kindergartners, Kip Drordy and Pete Thelman. In addition, many formerly one-off characters make their second appearance in this episode, such as Thad Jarvis, the Vampire Kids, Mike, Casey Miller, the basketball team, and the cheerleaders.

References to Popular Culture

 * Stan's video, "Make Bullying Kill Itself", is a parody of the "lip dub" genre. An example of a "lip dub" video, which closely resembles Stan's video, can be found here.
 * Stan's success of the "Make Bullying Kill Itself" video leads to his public breakdown in San Diego, California; this is a reference to Jason Russell of the Kony 2012 viral video campaign, who was arrested for allegedly masturbating in public.
 * Captain Kangaroo was mentioned in this episode. It is a children's TV program which ran from the 1950s to the 1980s.
 * When Stan goes to San Diego, the mayor of San Diego, Jerry Sanders, is shown advertising San Diego in a mock commercial.

Goofs

 * At the school assembly, 3 duplicates of Sally Turner can be seen in the audience.