I agree. There are various ways of confronting an attacker. Daring him to shoot you is about the dumbest I can think of. But making him think you are completely helpless and will do anything he demands is not smart, either, as numerous cases have shown.
Unfortunately, it's easy to Monday morning quarterback about such things, but no one knows what they will do in that kind of situation until it actually happens. Some people will panic, some will freeze up, some will try to deal with it the best they can.
I would grab the arm holding the gun, break his arm in half from the elbow, heat butt the perp, flip him around and then snap his neck.
Hey, if it works for Ahnold...
They are both excellent feints. As bluffs they depend on the cards in the attackers head.
I think the poor girl panicked, in her way.