Snape felt his stomach turn as he watched Fenrir Greyback creep up behind memory-Hermione, itching to throw a few dozen nasty hexes at him. He forced himself to calm; it was a memory, so cursing anything would have been a fruitless waste of time. He felt the real Hermione tense via the hand he still held with his as her other self was put under the Imperius curse. He tightened his grip a little in a small show of support and led her as they followed Greyback and Hermione to the other side of the clearing where Ron was battling.