Oops! You're right. But isn't my example too? I'm just treating the curtain as if it had a will of its own.
Your sentence is in the present tense too, but I think it's clear that it is the breeze that is causing the curtain to come to life, not that the curtain has a will of its own. There's nothing wrong with your sentence, I was merely pointing out that I would have worded it differently!