Austin Barron is recovering from surgery to put plates in his skull. He also has a brain bleed, and scrapes on his hands and knee.

The South Boston former military paratrooper is training for a November Ironman competition and was finishing up a ride from Boston to Billerica and back, when he believes he was sideswiped by a passing car that didn't stop. "[I just remember] something big hitting me from my rear/side and like losing control," he said. "I don't remember actually falling. I just remember kind of losing control."

He later came to in the hospital at Tufts Medical Center. Later, he says he learned that no one stopped, and no one called 911 as he lay on the ground for several minutes. A passing ambulance saw him in a pool of blood and stopped to help. "It was a busy time of day,"

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