Most people do not think that a vehicle rolling over should be something dangerous, as it seems like a relatively slow thing going on. Yet in reality these accidents cause a huge amount of centripetal (or is it centrifugal?) force as the vehicle rotates; generally enough force to open the doors and toss an untethered person out. And a person flying uncontrolled through the air does not walk away like on TV but instead usually dies from impacting the ground or something solid. Count me in as a seatbelt user.
