The Simpsons Grandpa meme, also known as 'Abe Simpson Walking In and Out,' originates from the Season 8 episode 'Bart After Dark.' In the scene, Abe Simpson enters the Maison Derrière burlesque house, whistles, hangs up his hat, but immediately does a 360-degree turn and leaves upon seeing his grandson Bart at the front desk. This sequence has become the universal internet shorthand for entering a situation or online thread, seeing something unexpected or cringeworthy, and choosing to exit immediately. It remains one of the most popular templates for expressing instant regret or social avoidance.