I am an athletic director for a Private School in FL. I guess I am a bit biased on the topic, but man, when kids get hurt, I just tell them to get up and get going. They normally will just go with it and keep on playing. It's not that I don't have sympathy for them, but the less attention you put on them getting hurt, the less it seems that they will.
I have seen some pretty bad accidents in the 2 years I have been doing this, including myself. I have seen a kid break his wrist twice, I dislocated my own knee playing soccer with them, and multiple times a student on student head on collision. We don't have crazy parents at the school I work out (but do have some hot ones).
I think it is just unreal that people are that paranoid about their kids getting hurt. The more they get hurt, the more they toughen up their bodies and get used to injuries. Thats a big part of life.
Like Nan said, if you jump head first from the monkey bars, you WILL get hurt. I had a student find that out the hard way. I just asked him if he was okay, he said maybe. I just laughed and said, if you are going to jump off head first, its going to hurt. He nodded and moved on.
Glad I work at a Private School.