Something I just noticed after rewatching it tonight...

It's something so simple but something I've liked. I watched The Craft a few months ago when it was on Netflix. (I had already seen it on tv but I don't own the DVD) At the end when Nancy slits Sarah's wrists, Sarah runs upstairs crying to the bathroom in desperation and then she walks into her bedroom and sits on the floor rocking back and forth not knowing what to do. And as she's doing this, the lights in her room are turning on and off in response to her magic. Well, I just watched this tonight online and it just so happens that the lights aren't turning on and off in that particular scene. It's so weird. I know they did on Netflix. What gives?