Check out this story:
http://www.heraldextra.com/content/view/212142/
Poor guy has nine kids and no health insurance and now he is paralyzed due to a sledding accident.
A very good friend of ours (19 years old) had a tubing accident right before Christmas and now she is a quadripilegic. It has been heartbreaking for us to watch. She had such a great life ahead of her.
Bottom line: We are going to be nazis now about sledding and tubing for our kids. The risks are too great. We will only allow it in rare, highly-supervised environments like Soldier Hollow.