 In the 1990s comedy, Third Rock from the Sun, one episode has Dick  (John Lithgow) meeting the Big Giant Head (William Shatner) at the  airport. Lithgow asks Shatner, "How was your flight, sir?" Shatner  replies, "Terrible. I could have sworn I saw a man on the wing of  the plane!" Lithgow said, "The same thing happened to me." This was  an intentional tip of the hat to the Twilight Zone episode,  Nightmare at 20,000 feet. Shatner played the disturbed passenger in  the original episode, and Lithgow played the disturbed passenger in  the movie segment of the same name.