The Charlie Day meme, commonly known as 'Pepe Silvia,' originated from a 2008 episode of It's Always Sunny in Philadelphia titled 'Sweet Dee Has a Heart Attack.' The scene depicts a frantic, disheveled Charlie Kelly attempting to explain a massive mailroom conspiracy involving red string and dozens of pinned notes. In the show, Charlie believes he has uncovered a man named Pepe Silvia who doesn't exist, though fans often joke it's actually his illiteracy misreading the word 'Pennsylvania' on the mail. The image has since become the definitive visual representation for anyone deep-diving into complex theories or frantically explaining a convoluted situation.