If the plane goes down...we all have bigger issues. Only way we really survive 99% of true crashes is 99% luck anyways. It isn't about that person being in your way. It is about you being strong enough to pull yourself through the cabin with broken limbs and get yourself out. Instead of worrying about "what if" this old lady can't move the door...go to a gym and get strong. That is what matters in accidents. Fighting instincts and strong able bodies.