Witness Robert Lee said he and his wife were on their way to a furniture store when they saw the accident on a road in League City, a suburb of Houston, Texas.
"We heard a loud boom that caught our attention. You couldn't miss it," Lee told our sister station KTRK.
Good Samartains pull family of five out of overturned Jeep
Lee, who is recently retired from the U.S. Coast Guard, said he felt a rush of adrenaline and jumped on top of the vehicle.
Once he saw that the passengers didn't need immediate medical attention, he opened the vertically-facing side door and began to help them out.
He said before he knew it, an entire group of people jumped in to lend a hand.
Together, Lee and the other good Samaritans pulled the five family members out of the flipped truck, including two young children and the family's Great Dane.
"It was just a blessing to see everyone come together," Lee said. "I'm real proud to live where I'm at."
Lee said all members of the family were OK after the accident.