Easter egg: Season 2: Disc 1: In Languages, click on Mr. Mackey's tie. Disc 3: In Languages, click on the bulls horn. In the episode Menu, click on the visitor head atop 'Prehistoric Ice Man'. Season 3: In Set Up, click on Sexual Harassment Pandas ears. Disc 2: In Set Up, click on Moses' eyes. Disc 3: In Set Up, click on Mr. Hankey's Santa hat.