I think it's incredibly sad about that boy. Iraq duty is tough, but that's nothing compared to losing a child. I hope their able to find some peace in the whole situation.
As for those who have vowed never to go on rollercoasters...you're missing out. I used to be terrified of them. All I can say is, you've got to face your fear.
You are
much safer on a roller coaster (at a reputable theme park) than driving in your car. Period. You only have the illusion of being in more control in your car. In reality, you have much less control than you think. You put your faith in the engineers who designed your car everytime you get in it...
And last of all, either their math about the coaster is off or the statement is misleading.
initial velocity: 0 m/s
final velocity: 0-->57mph = 0-->25.48 m/s
time: 2.8 s
average acceleration: a = (vf-vo)/t
average acceleration at launch: 9.1 m/s (.93 g's)
"Guests experience a force of nearly 5 Gs as they transition from launch to loop..."
This could very well be true, but it takes either a sustained acceleration (like the space shuttle taking off or a jet fighter in a steep turn) to make you black out. The 5g acceleration from the coaster is probably for less than a second. You can easily put a 5g+ instantaneous accleration on your leg by jumping off a chair.
Interesting comparison sheet:
Typcial Vibration/Acceleration Levels (pdf)