In every episode of Seinfeld, there is either a visual reference or a mention of Superman

The Rick and Morty pilot was written in 6 hours

The Southpark character Chef was based on a dining hall employee who creators Matt and Trey knew from their college days

The first Southpark episode was created via stop motion using construction paper cutouts

Mr. Mackey is based on Trey Parker's school counselor Mr. Lackey