Several years ago, I was in the last car of Thunder Mountain Railroad in Disney World and the lap bar didn't latch. As we left the station were were yelling for the operator to stop the train but he wasn't looking. We grabbed each other and did our best to wedge ourselves around the bar and into the seat.
Luckily for us we didn't get thrown because the ride is mostly circular. But it scared the crap out of us.
Luckily for us we didn't get thrown because the ride is mostly circular. But it scared the crap out of us.