Reply #7: "Passengers are held in by a bar that sits across their legs."

[Ian David]

<snip>

"That's the only one that gives you a scare. I mean, it does lift you out of your seat," said Liz Blest, 33, of Buffalo, who was staying at a campground next to the amusement park on a family trip.

Passengers are held in by a bar that sits across their legs.

More:
http://news.yahoo.com/army-amputee-thrown-ny-roller-coaster-dies-044044948.html

I think I may have found the problem.