So Jessica stuck her head into the empty shaft to shout to the people downstairs. And somehow, she missed noticing that the elevator was coming up towards her. If the elevator had been going down, one could say that she was in no position to observe the approaching lift. But, leaving aside the stupidity of sticking your head into an elevator shaft, if she was looking down, how could she miss the mass of metal inexorably headed her way?
Since an elevator cage and a skull are both solid objects, one had to give. Let's just say, the elevator won. Jessica will be missed by her family, but not by the gene pool.
"Talk about a brainless fool!"