Eerie, Indiana: The Other Dimension (1998)

S1E7 Last Laugh

A comedic savant takes Stanley under his wing, transforming him into a sharp-tongued joke machine. But Stanley's newfound talent quickly goes to his head, and he starts roasting everyone in sight, from his closest friends to complete strangers. His relentless, brutal humor crosses every line, leaving a trail of hurt feelings and shattered egos. The mentor watches in horror as his protégé becomes a monster of mockery, forcing Stanley to face the consequences of his unchecked ambition.