Arthur Dent, a perfectly ordinary Earthman, was rather surprised when his friend, Ford Prefect, suddenly revealed himself to be from a small planet somewhere in the vicinity of Betelgeuse, and not from Guildford after all.
15 seconds sound clip from The Hitchhiker's Guide to the Galaxy (1981) - Episode 4 sitcom.
You can hear this line at 00:00:35.461 in the Blu-ray version of the TV Series.
Quote context
[...]
- Shocking cockup. The mice were furious.
- Mice?
- Earthman, the planet you inhabited was commissioned, paid for and run by the mice.
- Mice?
- Arthur bruised his upper arm.
- But this was as nothing to their joint surprise
- For Zaphod, Ford and Trillian, surprise is pushed to its very limits when this happens.
[...]