How can you forget reading something like this..."Another thing that got forgotten was the fact that against all probability a sperm whale [and, previously, a bowl of petunias] had suddenly been called into existence several miles above the surface of an alien planet.
And since this is not a naturally tenable position for a whale, this poor innocent creature had very little time to come to terms with its identity as a whale before it then had to come to terms with not being a whale any more.
This is a complete record of its thought from the moment it began its life till the moment it ended it.
Ah...! What's happening? it thought.
Er, excuse me, who am I?
Hello?
Why am I here? What's my purpose in life?
What do I mean by who am I?
Calm down, get a grip now...oh! this is an interesting sensation, what is it? It's a sort of...yawning, tingling sensation in my...my...well, I suppose I'd better start finding names for things if I want to make any headway in what for the sake of what I shall call an argument I shall call the world, so let's call it my stomach.
Good. Ooooh, it's getting quite strong. And hey, what about this whistling roaring sound going past what I'm suddenly going to call my head? Perhaps I can call that...wind! Is that a good name? It'll do...perhaps I can find a better name for it later when I've found out what it's for. It must be something very important because there certainly seems to be a hell of a lot of it. Hey! What's this thing? This...let's call it a tail--yeah, tail. Hey! I can really thrash it about pretty good, can't I? Wow! Wow! That feels great! Doesn't seem to achieve very much but I'll probably find out what it's for later on. Now, have I built up any coherent picture of things yet?
No.
Never mind, hey this is really exciting, so much to find out about, so much to look forward to, I'm quite dizzy with anticipation...
Or is it the wind?
There really is a lot of that now, isn't there?
And wow! Hey! What this thing suddenly coming toward me very fast? Very, very fast. So big and flat and round, it needs a big wide-sounding name like...ow...ound...round...ground! That's it! That's a good name--ground!
I wonder if it will be friends with me?
And the rest, after a sudden wet thud, was silence.
Curiously enough, the only thing that went through the mind of the bowl of petunias as it fell was Oh no, not again. Many people have speculated that if we knew exactly why the bowl of petunias had thought that we would know a lot more about the nature of the Universe than we do now."
...or this...?!?"It is an important and popular fact that things are not always what they seem. For instance, on the planet Earth, man had always assumed that he was more intelligent than dolphins because he had achieved so much--the wheel, New York, wars and so on--while all the dolphins had ever done was muck about in the water having a good time. But conversely, the dolphins had always believed that they were far more intelligent than man--for precisely the same reasons.
Curiously enough, the dolphins had long known of the impending destruction of the planet Earth and had made many attempts to alert mankind to the danger; but most of the communications were misinterpreted as amusing attempts to punch footballs or whistle for tidbits, so they eventually gave up and left Earth by their own means shortly before the Vogons arrived.
The last ever dolphin message was misinterpreted as a surprisingly sophisticated attempt to do a double-backward somersault through a hoop while whistling the Star-Spangled Banner, but in fact the message was this: So long and thanks for all the fish.
In fact there was only one species on the planet more intelligent than dolphins, and they spent a lot of their time in behavioral research laboratories running around inside wheels and conducting frighteningly elegant and subtle experiments on man. The fact that once again man completely misinterpreted this relationship was entirely according to these creatures' plans."
BTW: These scenes are in the the movie. I give it 3 weeks - it's way too smart for the general audience.

These excerpts touch on about 0.2% of the book.