There are of course a lot more to say about preventing the accident that about what to do during the accident.

It's very helpful to see it coming than to be hit unexpectedly. When your brain realizes there is going to be a crash, or impact, it prepares the body for it. E.g. extra adrenaline is injected in the blood and muscles flex which is more likely to avoid broken bones.

Studies have shown, that auto passengers that saw the accident comming, suffered less severe injuries than those who were in relaxed state during the accident.