A new video shows the harrowing moment an airport worker in Florida was struck by lightning — leaving third-degree burns all over his body.

Austin Dunn is lucky to be alive after the freak accident July 22 at Southwest Florida International Airport, NBC 2 reported.

“We knew he wouldn’t give up. Once we knew he was alive, it was a relief but it was definitely the scariest thing,” said his sister Autumn Dunn. “You don’t expect it.”

The 21-year-old ground worker was on the tarmac with other employees backing up a Sun Country airplane for takeoff.

Dunn, wearing orange, is near the nose of the plane as the lightning bolt causes a bright orange flash to go off near him – knocking him to the ground.

His co-workers are then seen frantically running and trying to flag down help.

Dunn suffered burns on his hands, feet and chest, bleeding in his brain and severe muscle damage, his family said.

He was released from Tampa General Hospital Tuesday after being hospitalized for nearly two weeks, according to NBC Miami.

Southwest airport said its lightning warning system was activated when Dunn was hit.