CNN — A Tennessee man is in the hospital recovering from severe burns to his body after a fiery accident.
Authorities say the simple thing he did after the impact likely saved his life.
Assistant Fire Marshal Maggie Lawrence at the Metro Fire Department has seen this shocking surveillance video taken from a Riverside Drive Exxon station in Clarksville.
She says the quick action taken by this man, Chris Porter, is an important lesson that can save lives.
"He did everything properly," Lawrence said. "I was very pleased to see he did not panic and run because if he had panicked and ran it would've fed the fire. He would've been burned a whole lot worse than what he was."
Surveillance video from Monday morning shows a car suddenly go flying into oncoming traffic and smash into a pump.
Porter survives by rolling on the ground trying to put out the flames on his legs.
According to Clarksville Police, the driver, John Ward, says he blacked out behind the wheel and was not injured in the crash.
Though a blood test is pending, a crash report says there was no evident alcohol or drugs involved in what happened.
Meanwhile, Porter remains in critical but stable condition at Vanderbilt tonight.
His family says he's likely to stay at the hospital for another month or two with burns on 40 percent of his body.
But according to Lawrence, the fact Porter took the steps to stop drop and roll likely saved his life.