I would think that your daughter knew who she was marrying. It is sad she lost her husband but the risk was there and I am sure his activities made him the man she and you knew and loved. Life is full of risks, he could have just as easily been killed by a truck that lost control on a highway. Those that participate in extreme activities know the risk but I am sure they think it will be the other guy who buys the farm. As pilots of light GA planes we know the risks, by the numbers it is a far less safe activity then driving but we do it anyways, it is who we are and hopefully our loved ones understand it.