The 'What Is That Melody?' meme originates from the 2019 origin story trailer for the Overwatch character Sigma, an astrophysicist who loses his grip on reality after a failed experiment. The phrase is shouted by Sigma as he hears a haunting piano tune that only he can perceive. The internet quickly transformed this dramatic moment into a humorous reaction to hearing an incredibly good song or a 'banger' beat. On platforms like TikTok and Twitter, users pair the footage of Sigma floating and looking overwhelmed with various soundtracks to signify that a specific piece of music is so good it is literally transcending their reality.