Smith, 26, ran from his Braham, Minnesota home to help when he heard a loud bang.
The driver of a white SUV had blown through a stop sign and slammed into the officer's vehicle.
"When I came back up, there was a flame underneath the hood," Smith said. "At that time I knew he had to come out of there. I leaned down and told him to grab my shoulder and wrap his arm around mine. Then we started walking away from it."
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