I'm gonna be "that guy" and disagree with the entire premise. So apologies in advance for shaking the boat like a jackass.
I think the clip would be better served if the girl didn't know about the curse or lycanthropy in general. I think confusion and unexpectantness would be more enticing than understanding (albiet fearful) and preparation. With an unexpectant change, you get all that "what's happening to me" cliche goodness, accompanied by an inability to disrobe herself quickly enough (mass rippage ensues, which is a big part of any tf if you ask me and many others).
In short, keep the pain, moaning, labored breathing, and dynamic poses, but lose the awareness in favor of confused terror coupled with vain attempts to resist the inexorable change.
Classic-style, if you prefer. Hard to beat, in my opinion.
Anyway, just my perspective.
