JonTron is the YouTube channel of creator Jon Jafari, known since the early 2010s for loud, comedic reviews of video games, films, and internet culture. The line 'Oh boy, here we go' became one of his most recognisable introductions, delivered with the same eager energy he brings to the start of a review. Fans clipped the short phrase and shared it across YouTube, Discord, and meme soundboards, where it took on a second life as a reaction sound. It remains popular because it instantly signals that something entertaining is about to begin.