I don't know if anyone here has seen this, but all of these people are lucky to not have any major injuries. Watching the video I thought it was a prop strike that caused this, but it apparently was the landing gear. Here is what the video description says,
2/2/13- I was up for a birthday flight with my wife (her first flight ever), her mother and my seven month old boy when we received the shocking news that our carburator had iced over. After gliding over some field we found an ideal place to land the plane. The pilot was experienced in field landings but unfortunately the snow caused the landing gear to sever from the plane, flipping the plane front to back and smashing the tail before it came to a rest upside down. No one was hurt in the accident save for bruises, whiplash and minor cuts.