The 'That's The Joke' meme originates from a classic episode of The Simpsons titled 'A Star Is Burns,' where the action-hero character Rainier Wolfcastle (playing his character McBain) attempts a stand-up comedy routine. After a punchline fails to land with the audience, he flatly explains, 'That’s the joke,' highlighting the awkwardness of the moment. Online, the image became a staple reaction meme used to mock people who over-explain a joke or fail to understand sarcasm. It perfectly captures the condescending yet hilarious energy of pointing out a failed attempt at humor or a blatantly obvious observation.