What movie talked about superman being a real super hero?

I watched a move and in one scene a guy was talking about how superman was a real superhero. He talks about how clark was Superman's alter ego, unlike Batman and Spiderman who were normal men with superhero alter egos. I am drawing a total blank!!|||It's from "Kill Bill, Vol. 2." The speech was taken from "The Great Comic Book Heroes," an anthology of early superhero comics that generally featured an origin as well as an early adventure. The speech was written by Jules Feiffer and appropriated by Quentin Tarantino for the film.