- What does it mean?
- I don't know, but I definitely think we are on some kind of spaceship.

6 seconds sound clip from The Hitchhiker's Guide to the Galaxy (1981) - Episode 2 sitcom.

You can hear this line at 00:15:18.301 in the Blu-ray version of the TV Series.

Quote context

[...]

- Perhaps we are both going mad.

- Nice day for it. Sun.

- Sea.

- You know, if this is Southend, there's something very odd about it.

- What, do you mean the way the sea stays steady as a rock, and the buildings keep washing up and down?

- Yeah.

- I thought that was odd.

- 2 to the power of 700000 to 7 against, and falling.

- What's that?

- Sounded like a measurement of probability.

- What does it mean?

- I don't know, but I definitely think we are on some kind of spaceship.

- Then I can only assume we are not in the first class compartment.

- Southend seems to be melting away.

- The stars are swirling. A dustbowl. Snow.

- My legs drifting off into the sunset.

[...]