Really, having his girlfriend suddenly appear out of nowhere to help save his life is about as surprising as getting attacked in the first place. Giles stares at her, stares in outright shock at the place where she'd just been, and only just recovers enough to deliver one man on the ground a solid kick to the head to keep him out for a bit. Then, grabbing up the mirror that had fallen to the ground, he looks around for any sign of Ginia.