Metro Man comes from the 2010 animated film Megamind, where he is Metro City's celebrated, superpowered hero. The word promedio is Spanish for average, and Spanish speaking meme communities paired the name with that label as a joke on the long running average fan versus average enjoyer format. Short voice clips like this one spread on soundboards and short video platforms because they are easy to reuse out of context. The humor stays current because it can deflate any character, creator, or claim presented as exceptional.