Volvo Gave Away the Most Important Design They Ever Patented
Seat belts work. I once spent several minutes held upside down by one, after the car I was riding in rolled onto it's roof.  Everything loose in the car ended up on the headliner -- change, jackets, crusty old french fry bits...<p>BTW: You are almost certainly not strong enough to support yourself by one hand while you unbuckle.  But falling down to the roof <i>after</i> the wreck is far better than being thrown from the car <i>during</i> the wreck.