A man and a woman found themselves up a tree in a South Texas park in an attempt to get away from what they thought was a feral hog.

A police officer at Government Canyon State Natural Area, about 20 miles northwest of downtown San Antonio, was notified shortly before midnight June 21 after a woman called 911.

She said a growling feral hog was following her and that she had taken refuge in a tree, according to the Texas Parks and Wildlife Department.

The woman used her cellphone to send the officer her location, and when he hiked there he found her and a man in a tree. The woman warned the officer that the hog was nearby.

Left: A feral hog. Right: Rumble strips. (2012 File Photo / <p>Fort Worth Star-Telegram, North Dakota Department of Transportation</p>)

Just then, a car drove over rumble strips on nearby Galm Road and the officer noticed a drastic change in the woman's body language.

The pair nodded when he asked whether that was the hog they'd heard, and he explained that it was just rumble strips.

The man and woman were embarrassed by their mistake, but the officer reassured them that "the unknown can be scary," according to Texas Parks and Wildlife officials.