Apparently there are goats that faint when you startle them... It's not something they're trained to do, they are bred to faint. They were bred this way so that if a wolf attacked the flock the goat would be the snack and not the rest. (That seems more than a little wrong to me, but then I'm just imagining how lame it would be to be the goat.)
Anyway, breed history aside, it's pretty damned funny watching these things faint... funny to the point that I want one.
I wonder if you're allowed to keep a goat as a pet?