. >> that kid is 6-year-old tustin mains. >> tustin had taken over the steering wheel of the avalancheriven it through town roughly a mile, mile and a half, and turned it around north of town, and he had come back into town. >> as he passes the vehicle, frees realizes the situation is desperate. >> the little boy's eyes were just huge, and it was one of those nonverbal cues of, please help us. so i'm, like, i've got to do something, got to do something quick. >> 440. >> i turned around and the other vehicle slowed down to let me in front of him. the pickup hit the guardrail of the bridge and bounce off. then it started accelerating again away from me heading towards the oncoming traffic. so i just got as close as i could to it, parked, jumped out, and i just ran. i'm, like, i've got to catch them no matter what. >> he ran up to the side of the truck. >> get to the driver's door, i notice the subject and his eyes are barely open and his head is slumped to the side. and he just wasn't responsive at all. >> stop the car. hit the -- stop the car. brake. stop the car. i was able to jump up