Documentary from the talented Michael Madsen, as in the film maker, not the craptor whose best known for cutting off a rubber ear.
He gathers a large collection of thinky-people and asks them what they reckon would happen if aliens ever visited Earth.
He's made an excellent selection of boffin-folk as they give their best educated guesses about how such contact would effect us from a social, religious, scientific and military point of view.
Most importantly, however, was that at one point the camera passes a wall that someone appears to have graffitied with the word 'pubes'.
Anyway, it's very good.