High noon, and silence.
6 seconds sound clip from the The Day the Earth Stood Still (1954) classic radio play.
You can hear this line at 00:35:24 in the radio play.
Quote context
[...]
- If you like. The service elevator's open.
- You'll have to press the button, Mr. Carpenter.
- All over the world, traffic stopped dead in a million streets.
- Here and there, a horse-drawn vehicle clopped its melancholy way among the motionless motors.
- Bicycles moved, before awe and the common desolation made the riders stop of their own free will.
- Electric clocks stopped on the dot of noon.
- All across the powered world, the machines stood still.
[...]

 Dead of Night (1945)
 Dead of Night (1945)  Phantom of the Opera (1943)
 Phantom of the Opera (1943)  Scooby-Doo, Where Are You! (1969)
 Scooby-Doo, Where Are You! (1969)  Halloween III: Season of the Witch (1982)
 Halloween III: Season of the Witch (1982)  Knight Rider (1982)
 Knight Rider (1982)