When I'm working casually or not on a tense deadline it's managable. But often while doing important work I'll watch a movie I'm already familiar with so it won't be as big of a deal if I miss a bit for getting into movies. I've definitely written lines from movies into my projects before when I zone out, though. Glad to know that's at least someone else's experience. If I'm in a mode where I very seriously need to get work done, I'll put on white noise or music for background sound and try to focus on nothing else.