As he swerved back onto the highway, the left front tire of the Chevrolet Spectrum blew out, causing the car to overturn, police said.
The car slid under the trailer of a tractor trailer driven by Terry Ebron, 35, of Bellview, N.C., police said.
Ebron said the car was caught by the trailer's rear tires and was dragged an estimated 200 to 300 yards before he was able to stop.
"When they came back on the road, I thought I missed them. I looked in my rear view mirror and I saw sparks back there. I stopped as soon as I could," a distraught Ebron said late Saturday.
Ebron said he jumped out of his rig and looked inside the car. Several people inside were injured and bleeding, he said. "They were yelling, `Get me out,'" Ebron said.
A trooper arrived and smashed the windshield to help get two of the people out, Ebron said.
Lindamood was listed in stable condition Sunday evening at Martinsburg City Hospital. Also in stable condition there was Melissa Smith, 24, of Martinsburg.
Toni Anderson, 19, of Gore, Va., was in serious condition at Fairfax Hospital in Falls Church, Va. Another passenger taken there, Tina Taylor, 28, of Stephenson, Va., was in fair condition, according to a hospital spokesman. Both were taken to the hospital by helicopter.
Michael Lindamood, 25, of Winchester, was treated and released from the Winchester Medical Center. Garland Campbell, 38, of Winchester, was treated and released from Martinsburg City Hospital.
South Berkeley Fire Chief Bruce Chrisman said four of the six people were pinned inside the wreckage.
The car had to be lifted off two of the victims, Chrisman said.
He said it took about 15 to 20 minutes to free all the victims from the wreckage.
Ambulances from South Berkeley, Martinsburg, Berkeley County Ambulance Authority, Baker Heights and Clearbrook, Va., were called to the scene.
After the accident, a leather tennis shoe lay on the pavement, a large, bloody hole in it where a trooper said the victim's foot had been dragged outside of the car.
Traffic was blocked on the northbound lanes of I-81 for nearly an hour and traffic was detoured onto U.S. 11.
Staff writer Don Aines contributed to this story.