Those are the flaps. This is the thrust.
5 seconds sound clip from the Airplane (1980) movie soundboard.
You can hear this line at 00:53:27 in the Blu-ray version of the movie.
Quote context
[...]
- Ted! What are you doing here? You can't fly this plane.
- That's what I've been trying to tell these people.
- I don't have time to say this gently, so I'll be very direct.
- Everyone in this plane is in a desperate situation.
- Mr. Striker is the only hope we've got.
- Those are the flaps. This is the thrust.
- This must turn on the landing lights.
- Mayday? What the hell is that for?
- Mayday? Why, that's the Russian New Year. We'll have a big parade. We'll serve hot hors d'oeuvres.
- I can't stand it anymore. I've gotta get out of here. I've got to get out of here!
[...]