The "SpongeBob scared then happy" meme comes from the beloved animated TV show "SpongeBob SquarePants," featuring the iconic characters SpongeBob and Patrick. In this particular scene, SpongeBob is seen with a panicked expression while reading a daunting book, only to shift to a contented smile as he finds comfort in a hug from his best friend, Patrick. This scene is a quintessential example of the show's ability to capture exaggerated emotions, making it a perfect template for meme culture. The show's enduring popularity and its relatable characters have helped this moment become a staple in expressing rapid emotional shifts online.