Do **t adjust your computer screen: That really is Flappy Bird inside of Super Mario World.
It's **t a mashup piece of software, either. Using an exploit to the game's original Super Nintendo code, YouTuber SethBling managed to run Flappy Bird's actual source code inside a Super Mario World cartridge. By performing a complicated ****** of movements, he glitched the game out, allowing him to load in the source code — also by hand.
Watch the video above to see the steps of this amazing technical achievement, which SethBling performed*live on Twitch*on Sunday.*