Okay, so I help out with our Church youth group, and some of the kids talked me into seeing Harry Potter with them tonight at midnight. The problem is, I've never seen the first 3. Well, I saw 30 minutes of the first one last week. That's it. I had a roommate in college that was so into HP it drove me to swear off never seeing any of them. I'll give it a chance now. Anyway, what should I know? Can someone fill me in? Anything important before this one?