If you ever riden a roller coaster and observed people this would make sense. A few years back I rode on for the first time. My natural instinct was to hold on as hard as I could and not depend on the seat belts. After the ride was over I was exhausted just because of the shear strength I was using to fight the forces. I thought to myself how can people enjoy something like this, then I watch the coaster go round again. I noticed women did not really hold on but instead just put their faith in the belts holding them. They have no instinct to keep themselves stable and just sit there like a sack of potatoes. Hoping that the system takes care of them.