The 'Jack Black's Octagon' meme originates from a classic segment on the children's television show Sesame Street, where actor and musician Jack Black passionately explains the properties of an octagon to Elmo. His over-the-top enthusiasm and wide-eyed delivery—emphasizing that an octagon has 'eight fantastic sides and eight fantastic angles'—became an instant hit in the early days of YouTube and remains a staple of internet nostalgia. It is typically used to represent someone who is intensely focused on a single, often trivial, fact or to mock someone who is over-explaining a simple concept with unnecessary zeal. The meme perfectly captures the essence of Jack Black's signature high-voltage personality and is a favorite for those mocking obsessive attention to detail.