I hate to interrupt all the moday-morning quarterbacking, but here's my two cents worth:
First of all, I wasn't there, so I DON'T KNOW FOR SURE WHAT HAPPENED, all I know is what I can see from the video, and what I've been told by Jack.
Secondly, I'm not sure that anybody, outside of the few people who were standing there at the time of the jump, can decide who was at fault or who is to blame. THESE THINGS ARE CALLED ACCIDENTS FOR A REASON. Depending on which side you're on, you can argue equally well for either person being at fault if you present the evidence in the right way, but NO ONE here, including me, knows enough about what happened to say for sure. Because regardless of how strictly you follow the safety rules, and regardless of how carefully you ski, the minute you've started moving (in the park or otherwise), you're skiing on instinct alone, and there isn't a prayer in hell that you'll be able to consciously change what you're doing in the split-second you have to react in a life-threatening situation such as this.
I'll admit that I'm a little biased toward's the pro-jumper perspective because the jumper is a friend of mine, and it was the jumper who told me the story, but no matter how you look at it, no one is to blame.
As you all have said, the spotter should have checked the LZ, the little girl should never have been in the park, the coach should have paid more attention, the girl shouldn't have been in the LZ to begin with, Jack should have know exactly what kind of risk he was taking when he dropped in, and he should never have launched if there was any possibilty of someone being there...The list goes on and on. But even the most anal-retentive and paranoid person in the world can't ski under complete control EVER, and regardless of how careful you are in everything you do, you can never eliminate all possibility of something terrible happening.
As far as I'm concerned, no one is to blame here. There was nothing Jack could have done, nothing the girl could have done, nothing the spotter or the coach or the parents could have done to change what happened. And, even if you don't think this movie is funny, or if you think that Jack should be reamed a new you-know-what for hitting this poor little girl, I think that ALL of you would find that, when put in the same position, you couldn't have done anything better. In fact, it's truly incredible that Jack handled the situation as well as he did, because in a fight-or-flight situation such as the one he encountered in midair, not only did he not panic, freeze, and LAND on the girl (which certainly would have done some serious damage), but instead he stuck to his guns and probably ended up saving that girl's life, leaving her with only a scraped up helmet and a few bad memories, instead of a wheelchair and respirator.
I don't pretend to be arrogant enough to think that I can judge any situation like this from the comfort of my computer chair, and I don't think that anyone else who wasn't there should. All of you have made great points and argued your opinions ad nauseum, but as far as I'm concerned, what's done is done, and it really doesn't matter if you laughed at this video or not. If nothing else, seeing this movie has given you all something to think about, and something to discuss over tomorrow night's dinner, and no matter which side you're on, I guarantee that this video has changed the way you look at skiing.