This syndrome got its name from the occurrence of domesticated pigs going through a temporary state in which the pig will run wild.

A few pigs ran squealing into the bush at our approach.

The pig ran about in front of us and looked at us furiously.

With that the pigs all ran into the sea, sucked huge lungfuls of water, and after only a little kicking, drowned.

A squealing pig ran past him, a jet of blood spurting from its side.

The pig was very frightened and, emitting loud shouts, ran away to the forest.

Black pigs ran unattended in the yard, with no child to feed them.

Black pigs, let loose from somewhere at the back of the stage, ran squealing between the priests' legs.

When the hooch fell down, the pig ran around in circles, squeal-ing.

Hog meat was popular because pigs could run free in the woods, eat acorns and things like that.