A West Texas grandmother detailed the chilling moment when she came face-to-face with a gunman on a deadly freeway rampage.

Shauna Saxton said stopped her car Saturday afternoon at an intersection near 1-20 in Odessa and heard a “pop, pop, pop” sound, news station CBS7 reported.

“I looked over my shoulder and a gold car pulled up and the man was there and he had a very large gun and it was pointing at me, and in that moment all I could think about was driving away, but there were two cars in front of me,” she told the news station.

She said cars in front of her parted and she was able to speed away with her grandson in the backseat.

“All I knew was that I was the target and I had to get out of there fast and I got aggressive a little bit with my driving,” Saxton said.

Saxton broke down as she described how close her family was to danger, saying, “The thing is if I didn’t look over my shoulder, I wouldn’t have seen it and I wouldn’t have reacted.”

The mass shooting began Saturday afternoon when the gunman pulled a rifle on police, leaving five dead and more than a dozen others injured.

The name of the shooter — a white man in his 30s — hasn’t been released and his motive is unknown.