I watched an SUV roll off a highway in front of us, once at speed. It rolled two times. It ended up upside down. We rushed to give assistance, and the entire interior of that SUV was a mess. It was a Dad and two children with all their mountain bikes, and camping gear. Every thing had come apart, and the interior was splashed with the soda drinks they had, had in paper cups. The gas tank was ruptured and leaking in the upside down vehicle. So get people out was a priority. As one of the first to the scene, I found a boy in the back that had a mountain bike under him. He was being held up side down by the straps. Took the bike out and threw it away. Asked him "Are you hurt and can you move everything in your body; neck, arms, legs." He tested this, and said, "Yes, I feel okay." I released the belt holding him up to fall in to my hands and then pulled him out. Same time other people were pulling others out of the vehicle, cause everyone stopped, off the road, to give assistance at the same time with no hesitation. This was a remote area in Oregon. It took three hours to get an EMT there. The Dad was very confused. We had to get him to lay down so we could check him out for a head injury and talk him down. The other older boy, seemed to be entirely okay in the passenger seat. He was a pain in the ass to everyone else, as he was saying its all okay, and we helper people should just leave. My boy, rescued, had a big knock to the head, possibly by the mountain bikes. The RV people also stopped, and provided ICE packs to put on his head bump that was forming. When the EMTs finally arrived they said this was good what we had done.