Sorin has a moment to think on how utterly annoying it is that she doesn't even react, he also has a moment to think on how, really, he's being a little immature over this... But then she is firing, and he can think of nothing else.

The bullet doesn't kill him, or even maim him that much - it isn't of silver and so it doesn't set his blood on fire. But it still staggers him; and he blurs back to visible - clutching at his arm, mildly shocked at actually being hit; even if there was little opportunity to avoid it.

Time will tell if the hesitation is enough.