Who Shot Mr. Burns?
A television screen in Moe's Tavern shows that "Pardon My Zinger" (the fake Comedy Central show that Smithers watches) is shown at 3 p.m. on weekdays. It is later shown that Burns was shot at 3 p.m. Smithers says that he has never missed an episode of the show. He walks the opposite way that Burns does before he gets shot.