I love roller coasters, and X2 is definitely one of the most intense coasters in the world, especially because of the flipping elements. When I rode it two years ago, my head hit the seat back pretty hard during the final flip. I was seeing stars. It was my 4th ride on X2, and that head-hit made me decide it was my final ride. So, I can see how this kid was injured.
See, your mistake was sitting in the seat and being restrained. I found that hanging outside the car, hanging on only with my left hand, was far more comfortable and eminently safe.
I never hit my head. Well, until I fell to the ground. Then, yeah.
Just jump into the Grand Canyon next time you want a thrill. Its a lot cheaper.