I don't think this trait is adaptive....

Fainting goats....

One of the people on the video says the goats never make each other faint. I don't buy it. I would definitely hide behind a tree, smoking goat cigarettes and telling goat jokes, until an unsuspecting friend walked by. You could jump out and bleat loudly, and the friend would go belly up, legs in the air. I think I may try this over at the Duke faculty club this week; it could work. Though our faculty are not really goats, I suppose; more sheepish.

(thanks to Jeremy B., for the notice)