What comedian made it big mouthing to the theme song of Mighty Mouse?

Andrew Geoffrey "Andy" Kaufman (January 17, 1949 – May 16, 1984) was an American entertainer, actor, and performance artist. While often referred to as a comedian, Kaufman did not consider himself to be one. He disdained telling jokes and engaging in comedy as it was traditionally understood, referring to himself instead as a "song-and-dance man". "I'm not trying to be funny," he once said in a rare introspective interview. "I just want to play with their heads."

Kaufman first caught major attention with a character known as Foreign Man, who claimed to be from Caspiar (a fictional island in the Caspian Sea). As this character, Kaufman would appear on the stage of comedy clubs, play a recording of the theme from the Mighty Mouse cartoon show while standing perfectly still, and lip-sync only the line "Here I come to save the day" with great enthusiasm. He would proceed to tell a few jokes and perform a number of impersonations such as television character Archie Bunker or President Richard Nixon. Some variations of this performance were broadcast in the first season of Saturday Night Live; the Mighty Mouse number was featured in the October 11, 1975, premiere, while the joke-telling and Bunker impression were included in the November 8 broadcast that same year.