A group of people on snowmobiles watched as their friend did something incredibly stupid. Riding around in an area that you are familiar with of that is frequented by other people is one thing, but riding around on unfamiliar terrain is a whole other story.
There are so many safety precautions they could have taken, but didn't take. Even if an avalanche was inevitable, the driver still wasn't prepared with safety equipment that would have saved his life if he was buried.
He is lucky that he wasn't buried and his friends found him quick enough to get pressure off his chest so he could breath. He was very very lucky.