Whoa. Sometimes I really wish the scale went up to 10, and this is one of those times. This is the Snape that lives in my head. Snape's wide, startled eyes are perfect. His hand in the 10th frame, all 'OMG what's happening what do I do!!' is perfect perfect perfect. The pictures really tell a story without feeling at all forced. I also love the clothes and Harry's askew glasses and Snape's hair and Snape's nose and Snape's mouth and the books and the way Harry just sort of attacks him and the amazing transition between the 11th and 12th frames and, you know... everything.
To sum up, it makes me all happy inside and you are made of win.