For millions of years, as pigs snorted and snuffed their way across the planet, evolving and learning to dodge gray wolves and tigers and coyotes and alligators, they were almost assuredly safe from any potential threats from the sky.
Then they arrived in Texas, where in addition to the rare predatory large mammal, a wild pig today might be forced to evade, for example, a cascade of 5.56-caliber bullets fired from a hundred-odd feet above by an ARu201115 semiautomatic rifle in the hands of some adventurous tourist from Pennsylvania or Mexico or Australia. Unfortunately for said pig, evolution has not yet blessed him with the neck flexibility needed to look up.