The line comes from Airplane!, the 1980 disaster-movie parody directed by Jim Abrahams and David and Jerry Zucker. In the film, Ted Striker answers Dr. Rumack's question about whether he is serious with the now-famous correction about his name, turning a misunderstanding of the word surely into a joke. The exchange became one of the film's most quoted moments and has lived on in memes, reaction videos and edits, where a straight-faced correction lands funnier than an obvious punchline.