He spent a lot of time flying. He learnt to communicate with birds and discovered that their conversation was fantastically boring. It was all to do with wind speed, wing spans, power-to-weight ratios and a fair bit about berries. Unfortunately, he discovered, once you have learnt birdspeak you quickly come to realize that the air is full of it the whole time, just inane bird chatter. There is no getting away from it.

Nothing travels faster than the speed of light, with the possible exception of bad news, which obeys its own special laws.

There are two things you should remember when dealing with parallel universes. One, they're not really parallel, and two, they're not really universes

Ford... you're turning into a penguin. Stop it.

How many roads must a man walk down?

I'm 48, which is a bit of a shock to me. Why only last year I thought I was a precocious young thing!

The technology involved in making anything invisible is so infinitely complex that nine hundred and ninety-nine billion, nine hundred and ninety-nine million, nine hundred and ninety-nine thousand, nine hundred and ninety-nine times out of a trillion it is much simpler and more effective just to take the thing away and do without it.