This is one of their ventilator shafts. You can feel the warm air rising.
6 seconds sound clip from the Forbidden Planet (1956) movie soundboard.
You can hear this line at 01:01:16 in the Blu-ray version of the movie.
Quote context
[...]
- Listen. Circuits opening and closing.
- This is one of their ventilator shafts. You can feel the warm air rising.
- Look down here. Look down, gentlemen. Are you afraid?
- Seventy-eight hundred levels...
- And 400 other shafts like this one.
[...]
Forbidden Planet (1956) Sound Clip
Actors: Walter Pidgeon (Dr. Edward Morbius), Anne Francis (Altaira "Alta" Morbius), Leslie Nielsen (Commander John J. Adams), Robby the Robot (Marvin Miller)
Trail of the Pink Panther (1982) 526 Sounds / Quotes
The Hunt for Red October 940 Sounds / Quotes
Black Belt Jones (1974) 458 Sounds / Quotes
The Rescuers Down Under (1990) 478 Sounds / Quotes
DuckTales: The Movie (1990) 563 Sounds / Quotes