This video is perfectly named, because the behaviour of the parachutists in their wing suits is exactly like downy chicks trying to copy their parents flight before they have developed the feathers, muscles and cardiovascular system required for flight. They jump up and down, fall on their bellies and crash into one another, all of which tones them up so that when they are fully fledged they can fly, albeit with an initial amusing lack of directional control.
I like they way they have used the tent as an egg metaphor, too.
On a completely different topic,
This is a good review site for pilot-related iPod apps.