Gwen was quickly writing the information Remus was giving her, a worried expression on her face. "There's nothing anyone can do to avoid this Killing Curse thing?" she asked. She couldn't help but wonder if it would work on Jack. Sure, it might kill him, but he'd resurrect wouldn't he? And if he did and they weren't expecting it, at least they'd have the element of surprise on their side.
"Does hiding behind something help? Can you move out if its path?" She needed to know, mostly, if it could skip around Jack to hit someone else or if hiding behind an inanimate object was an option. If not, it was a rather terrifying prospect. How could you fight someone who could kill you with a thought and a wave of a wand?