Ford Prefect: Don't suppose we could get picked up by a bird?
Zaphod: A bird?!
Ford Prefect: Yean, a bird. You know, with wings.
Zaphod: Have to be a swutting big one, man!
Ford Prefect: Or two of them.
Zaphod: Hey, will you get your head back on?! The chances of one guy falling onto a passing bird are ten to the power of my overdraft, but two?! That's just -