All it requires is simply the ability to throw yourself forward with all your weight, and the willingness not to mind that it’s going to hurt.
That is, it’s going to hurt if you fail to miss the ground.
Most people fail to miss the ground, and if they are really trying properly, the likelihood is that they will fail to miss it fairly hard.
Clearly, it’s the second point, the missing, which presents the difficulties.
One problem is that you have to miss the ground accidentally. It’s no good deliberately intending to miss the ground because you won’t. You have to have your attention suddenly distracted by something else when you’re halfway there, so that you are no longer thinking about falling, or about the ground, or about how much it’s going to hurt if you fail to miss it.
If, however, you are lucky enough to have your attention momentarily distracted at the crucial moment by, say, a gorgeous pair of legs (tentacles, pseudopodia, according to phyllum and/or personal inclination) or a bomb going off in your vicinity, or by suddenly spotting an extremely rare species of beetle crawling along a nearby twig, then in your astonishment you will miss the ground completely and remain bobbing just a few inches above it in what might seem to be a slightly foolish manner.
This is a moment for superb and delicate concentration.
Bob and float, float and bob.
Ignore all considerations of your own weight and simply let yourself waft higher.
Do not listen to what anybody says to you at this point because they are unlikely to say anything helpful.
They are most likely to say something along the lines of, “Good God, you can’t possibly be flying!”
It is vitally important not to believe them or they will suddenly be right.
Waft higher and higher.
Try a few swoops, gentle ones at first, then drift above the treetops breathing regularly.
Do not wave at anybody.
When you have done this a few times you will find the moment of distraction rapidly becomes easier and easier to achieve. You will then learn all sorts of things about how to control your flight, your speed, your manoeuvrability, and the trick usually lies in not thinking too hard about whatever you want to do, but just allowing it to happen as if it was going to anyway.
You will also learn how to land properly, which is something you will almost certainly cock up, and cock up badly, on your first attempt.
There are private flying clubs you can join which help you achieve the all-important moment of distraction. They hire people with surprising bodies or opinions to leap out from behind bushes and exhibit and/or explain them at the crucial moments. Few genuine hitch-hikers will be able to afford to join these clubs, but some may be able to get temporary employment at them.
Trillian read this longingly, but reluctantly decided that Zaphod wasn’t really in the right frame of mind for attempting to fly, or for walking through mountains or for trying to get the Brantisvogan Civil Service to acknowledge a change-of-address card, which were the other things listed under the heading “Recreational Impossibilities”.
Instead, she flew the ship to Allosimanius Syneca, a world of ice, snow, mind-hurtling beauty and stunning cold. The trek from the snow plains of Liska to the summit of the Ice Crystal Pyramids of Sastantua is long and gruelling, even with jet skis and a team of Syneca Snowhounds, but the view from the top, a view which takes in the Stin Glacier Fields, the shimmering Prism Mountains and the far ethereal dancing icelights, is one which first freezes the mind and then slowly releases it to hitherto unexperienced horizons of beauty, and Trillian, for one, felt that she could do with a bit of having her mind slowly released to hitherto unexperienced horizons of beauty.
They went into a low orbit. There lay the silver-white beauty of Allosimanius Syneca beneath them. Zaphod stayed in bed with one head stuck under a pillow and the other doing crosswords till late into the night.
Trillian nodded patiently again, counted to a sufficiently high number, and told herself that the important thing now was just to get Zaphod talking.
She prepared, by dint of deactivating all the robot kitchen synthomatics, the most fabulously delicious meal she could contrive delicately oiled meals, scented fruits, fragrant cheeses, fine Aldebaran wines.
She carried it through to him and asked if he felt like talking things through.
Zark off, said Zaphod.