You are about to feel some initial ill-effects, as you have been rescued from certain death, at an improbability level of 2 to the power of 260199 to 1 against, possibly much higher.

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

You can hear this line at 00:16:43.636 in the Blu-ray version of the TV Series.

Quote context

[...]

- That is not the point. Quack! Point is, now I am a perfectly safe penguin. Quack.

- My colleague here is rapidly running out of limbs.

- Isn't there anything you feel you ought to be telling us? Quack.

- Welcome to the starship, Heart of Gold.

- Please do not be alarmed by anything you see or hear around you.

- You are about to feel some initial ill-effects, as you have been rescued from certain death, at an improbability level of 2 to the power of 260199 to 1 against, possibly much higher.

- We are now cruising at a level of 2 to the power of 25000 to 1 against and falling.

- And we will be restoring normality as soon as we are sure what is normal anyway. Thank you.

- Arthur, this is fantastic! We're being picked up by a ship with a new Infinite Improbability Drive. I mean, this is... This is incredible, Arthur. Arthur?

- What's happening?

[...]