Wait, wait What if the shield is actually a really really intense magnetic field? If it was strong enough that would stop almost anything, & it wouldn't push her over! WOO! only one teeny tiny problem....that sort of energy would need her to have a personal nuclear generator...which would probably farther dissuade anyone from shooting anything remotely explosive at her. It would also probably leave her sterile. On the plus, any of those starwars battle droids going near here would have their circutry fried from the magnetismismwhatever SewerRat (did I learn nothing during physics except how to build a magnetic shield)