“Oh, Christ,” Johnson yells before driving off in the video.
“Too funny not to share,” Carrie Johnson said in the caption on Instagram.
It is not clear which wildlife park they were visiting, but other posts on the same account show the family visiting Dinosaur Valley Park, about 80 miles (128 kilometers) southwest of Dallas.
Boris Johnson, who served as prime minister from 2019 to 2022, was also spotted with his wife at a local restaurant in Lake Granbury, Texas, on Sunday, according to the restaurant's Facebook page.
“We are so honored to have him as our guest!!” said Stumpy's Lakeside Grill in a Facebook post with a photo of the former prime minister.