On this particular Thursday, things were moving through the ionosphere many miles above the surface of the planet.
8 seconds sound clip from The Hitchhiker's Guide to the Galaxy (1981) - Episode 1 sitcom.
You can hear this line at 00:12:37.680 in the Blu-ray version of the TV Series.
Quote context
[...]
- Five years, maybe six. Most of it seemed to make some kind of sense at the time.
- I don't know. Why? Do you think it's the sort of thing you're likely to say?
- Drink up. The world's about to end.
- This must be Thursday. I never could get the hang of Thursdays.
- Several huge, yellow, slab-like somethings, huge as office blocks, silent as birds.
- They hung in the air exactly the same way that bricks don't.
- The planet was almost totally oblivious of their presence.
[...]