lots of vairables in every crash but nope you will/can still hit 2 foot in front of you face in a 3 point inertia belt, just watch the endless crash dummy vids. (albiet you do sink at an angle but you are praying the 2 never meet (head and bar!))
slightly sidetracking but on the topic of saftey it's a big grey area running harnesses with no cage, it's always a big debate on if it's safe or not - specifically to do with rolling the car. General opinion is proper fixed rigid seats are the minimum to use with harnesses if you dediced to go that route. There there's also cage's and no helmet on top of that! Cetainly no helmet and no harnesses with a cage is 100% a no-no. I've personally been in a crash where I smacked the side of my face up against the front side window, if the car had been caged the top of my head would have very likley cracked open on the cage. Foam is still going to allow significant internal bleeding before anyone mentions it. Helmets and foam in my opinion all times when using a full front cage.
For me though, on a road car going stripped for serious track use = Half rear cage, rigid buckets and 6 point harnesses. And on the road I would use the 3 point inertia belts.
A race car / full time track obviously gets the front half of the cage and helment / harnesses full time.