Why is everyone such a douche?
Don't be happy that he got hurt. That is just mean. "ohhh, he's destroying the lip of the on-jump." Boo-hoo, he's destroying the lip of the on-jump. He paid for a pass, he can use the mountain and its terrain however he pleases to. Also, as if it fucks up the lip so bad. Most of the time they jump of the SIDE of the jump, hence the name "side-jumping". And most of the time, we don't use the SIDE of the jump to enter onto the rail (with the exception of handrails). Point being, side-jumping really 80% of the time won't affect your ability to enter a rail.
With that said, the kid should not have been in the park. He clearly cannot ski, and therefore should not be using a terrain park. He cannot turn and stay in the front seat, so he really has no reason to be anywhere but the bunny-slopes. Regardless, he paid for a pass, so he can use the mountain and it's features how he would like.
And whoever isn't sorry that the kid got hurt is just an asshole. It's one thing to think he is an idiot, but it's another to wish him to be hurt. And the fall did look like his leg got caught bad on a tree; I think it looked really painful. It's just plain mean to not be upset when someone gets hurt. We all ski to have fun, not to be mean to people of a lesser ability. He shouldn't have been in a park, and he was; that was his mistake. But he still got hurt, so there is no reason to be mean about it.